diff --git a/backend/src/controllers/user.controller.ts b/backend/src/controllers/user.controller.ts
index 43fd6b0..bc72742 100644
--- a/backend/src/controllers/user.controller.ts
+++ b/backend/src/controllers/user.controller.ts
@@ -1,194 +1,205 @@
 import {Count, CountSchema, Filter, FilterExcludingWhere, repository, Where,} from '@loopback/repository';
-import {del, get, getModelSchemaRef, param, patch, post, put, requestBody, response,} from '@loopback/rest';
+import {del, get, getModelSchemaRef, param, patch, post, Request, requestBody, response, RestBindings,} from '@loopback/rest';
 import {User} from '../models';
 import {UserRepository} from '../repositories';
 import {
-  TokenServiceBindings,
-  UserServiceBindings
+    TokenServiceBindings,
+    UserServiceBindings
 } from '@loopback/authentication-jwt';
 import {inject} from '@loopback/core';
-import {TokenService} from '@loopback/authentication';
+import {authenticate, TokenService} from '@loopback/authentication';
 import {SecurityBindings, UserProfile} from '@loopback/security';
 import {genSalt, hash} from 'bcryptjs';
 import {SzakdolgozatUserService} from '../services';
 
 export class UserController {
-  constructor(
-      @inject(TokenServiceBindings.TOKEN_SERVICE)
-      public jwtService: TokenService,
-      @inject(UserServiceBindings.USER_SERVICE)
-      public userService: SzakdolgozatUserService,
-      @inject(SecurityBindings.USER, {optional: true})
-      public user: UserProfile,
-      @repository(UserRepository)
-      public userRepository : UserRepository,
-  ) { }
+    constructor(
+        @inject(TokenServiceBindings.TOKEN_SERVICE)
+        public jwtService: TokenService,
+        @inject(UserServiceBindings.USER_SERVICE)
+        public userService: SzakdolgozatUserService,
+        @inject(SecurityBindings.USER, {optional: true})
+        public user: UserProfile,
+        @repository(UserRepository)
+        public userRepository: UserRepository,
+    ) {
+    }
 
-  @post('/users')
-  @response(200, {
-    description: 'User model instance',
-    content: {'application/json': {schema: getModelSchemaRef(User, {exclude: ['password']})}},
-  })
-  async register(
-    @requestBody({
-      content: {
-        'application/json': {
-          schema: getModelSchemaRef(User, {
-            title: 'Registration request',
-            exclude: ['id', 'role']
-          }),
-        },
-      },
+    @post('/users')
+    @response(200, {
+        description: 'User model instance',
+        content: {'application/json': {schema: getModelSchemaRef(User, {exclude: ['password']})}},
     })
-    request: Pick<User, 'email' | 'name' | 'password'>,
-  ): Promise<User> {
-    const password = await hash(request.password, await genSalt());
-    const user = {
-      email: request.email,
-      name: request.name,
-      password: password,
-      role: 'student'
-    } as User;
-    return this.userRepository.create(user);
-  }
-
-  @post('/users/login', {
-    responses: {
-      '200': {
-        description: 'Token',
-        content: {
-          'application/json': {
-            schema: {
-              type: 'object',
-              properties: {
-                token: {
-                  type: 'string',
+    async register(
+        @requestBody({
+            content: {
+                'application/json': {
+                    schema: getModelSchemaRef(User, {
+                        title: 'Registration request',
+                        exclude: ['id', 'isAdmin']
+                    }),
                 },
-              },
             },
-          },
-        },
-      },
-    },
-  })
-  async login(
-      @requestBody({
-          description: 'The input of login function',
-      required: true,
-      content: {
-        'application/json': {
-          schema: getModelSchemaRef(User, {exclude: ['id', 'role', 'name']})
-        },
-      }}) credentials: Pick<User, 'email' | 'password'>,
-  ): Promise<{token: string}> {
-    // ensure the user exists, and the password is correct
-    const user = await this.userService.verifyCredentials(credentials);
-    // convert a User object into a UserProfile object (reduced set of properties)
-    const userProfile = this.userService.convertToUserProfile(user);
+        })
+            request: Pick<User, 'email' | 'name' | 'password'>,
+    ): Promise<User> {
+        const password = await hash(request.password, await genSalt());
+        const user = {
+            email: request.email,
+            name: request.name,
+            password: password,
+            isAdmin: false
+        } as User;
+        return this.userRepository.create(user);
+    }
 
-    // create a JSON Web Token based on the user profile
-    const token = await this.jwtService.generateToken(userProfile);
-    return {token};
-  }
-
-  @get('/users/count')
-  @response(200, {
-    description: 'User model count',
-    content: {'application/json': {schema: CountSchema}},
-  })
-  async count(
-    @param.where(User) where?: Where<User>,
-  ): Promise<Count> {
-    return this.userRepository.count(where);
-  }
-
-  @get('/users')
-  @response(200, {
-    description: 'Array of User model instances',
-    content: {
-      'application/json': {
-        schema: {
-          type: 'array',
-          items: getModelSchemaRef(User, {includeRelations: true}),
+    @post('/users/login', {
+        responses: {
+            '200': {
+                description: 'Token',
+                content: {
+                    'application/json': {
+                        schema: {
+                            type: 'object',
+                            properties: {
+                                token: {
+                                    type: 'string',
+                                },
+                                user: getModelSchemaRef(User, {exclude: ['id', 'password']})
+                            },
+                        },
+                    },
+                },
+            },
         },
-      },
-    },
-  })
-  async find(
-    @param.filter(User) filter?: Filter<User>,
-  ): Promise<User[]> {
-    return this.userRepository.find(filter);
-  }
-
-  @patch('/users')
-  @response(200, {
-    description: 'User PATCH success count',
-    content: {'application/json': {schema: CountSchema}},
-  })
-  async updateAll(
-    @requestBody({
-      content: {
-        'application/json': {
-          schema: getModelSchemaRef(User, {partial: true}),
-        },
-      },
     })
-    user: User,
-    @param.where(User) where?: Where<User>,
-  ): Promise<Count> {
-    return this.userRepository.updateAll(user, where);
-  }
+    async login(
+        @requestBody({
+            description: 'The input of login function',
+            required: true,
+            content: {
+                'application/json': {
+                    schema: getModelSchemaRef(User, {exclude: ['id', 'isAdmin', 'name']})
+                },
+            }
+        }) credentials: Pick<User, 'email' | 'password'>,
+    ): Promise<{ token: string, user: Omit<User, 'id' | 'password'> }> {
+        // ensure the user exists, and the password is correct
+        const user = await this.userService.verifyCredentials(credentials);
+        // convert a User object into a UserProfile object (reduced set of properties)
+        const userProfile = this.userService.convertToUserProfile(user);
 
-  @get('/users/{id}')
-  @response(200, {
-    description: 'User model instance',
-    content: {
-      'application/json': {
-        schema: getModelSchemaRef(User, {includeRelations: true}),
-      },
-    },
-  })
-  async findById(
-    @param.path.number('id') id: number,
-    @param.filter(User, {exclude: 'where'}) filter?: FilterExcludingWhere<User>
-  ): Promise<User> {
-    return this.userRepository.findById(id, filter);
-  }
+        // create a JSON Web Token based on the user profile
+        const token = await this.jwtService.generateToken(userProfile);
+        return {token, user};
+    }
 
-  @patch('/users/{id}')
-  @response(204, {
-    description: 'User PATCH success',
-  })
-  async updateById(
-    @param.path.number('id') id: number,
-    @requestBody({
-      content: {
-        'application/json': {
-          schema: getModelSchemaRef(User, {partial: true}),
+    @post('/users/logout', {
+        responses: {
+            '204': {
+                description: 'Logged out',
+            },
         },
-      },
     })
-    user: User,
-  ): Promise<void> {
-    await this.userRepository.updateById(id, user);
-  }
+    @authenticate('jwt')
+    async logout(@inject(RestBindings.Http.REQUEST) request: Request): Promise<void> {
+        const split = request.headers.authorization?.split(' ');
+        if (split && split.length > 1) {
+            if (this.jwtService.revokeToken) {
+                await this.jwtService.revokeToken(split[1]);
+            } else {
+                console.error('Cannot revoke token');
+            }
+        }
+    }
 
-  @put('/users/{id}')
-  @response(204, {
-    description: 'User PUT success',
-  })
-  async replaceById(
-    @param.path.number('id') id: number,
-    @requestBody() user: User,
-  ): Promise<void> {
-    await this.userRepository.replaceById(id, user);
-  }
+    @get('/users/count')
+    @response(200, {
+        description: 'User model count',
+        content: {'application/json': {schema: CountSchema}},
+    })
+    async count(
+        @param.where(User) where?: Where<User>,
+    ): Promise<Count> {
+        return this.userRepository.count(where);
+    }
 
-  @del('/users/{id}')
-  @response(204, {
-    description: 'User DELETE success',
-  })
-  async deleteById(@param.path.number('id') id: number): Promise<void> {
-    await this.userRepository.deleteById(id);
-  }
+    @get('/users')
+    @response(200, {
+        description: 'Array of User model instances',
+        content: {
+            'application/json': {
+                schema: {
+                    type: 'array',
+                    items: getModelSchemaRef(User, {includeRelations: true}),
+                },
+            },
+        },
+    })
+    async find(
+        @param.filter(User) filter?: Filter<User>,
+    ): Promise<User[]> {
+        return this.userRepository.find(filter);
+    }
+
+    @patch('/users')
+    @response(200, {
+        description: 'User PATCH success count',
+        content: {'application/json': {schema: CountSchema}},
+    })
+    async updateAll(
+        @requestBody({
+            content: {
+                'application/json': {
+                    schema: getModelSchemaRef(User, {partial: true}),
+                },
+            },
+        })
+            user: User,
+        @param.where(User) where?: Where<User>,
+    ): Promise<Count> {
+        return this.userRepository.updateAll(user, where);
+    }
+
+    @get('/users/{id}')
+    @response(200, {
+        description: 'User model instance',
+        content: {
+            'application/json': {
+                schema: getModelSchemaRef(User, {includeRelations: true}),
+            },
+        },
+    })
+    async findById(
+        @param.path.number('id') id: number,
+        @param.filter(User, {exclude: 'where'}) filter?: FilterExcludingWhere<User>
+    ): Promise<User> {
+        return this.userRepository.findById(id, filter);
+    }
+
+    @patch('/users/{id}')
+    @response(204, {
+        description: 'User PATCH success',
+    })
+    async updateById(
+        @param.path.number('id') id: number,
+        @requestBody({
+            content: {
+                'application/json': {
+                    schema: getModelSchemaRef(User, {partial: true}),
+                },
+            },
+        })
+            user: User,
+    ): Promise<void> {
+        await this.userRepository.updateById(id, user);
+    }
+
+    @del('/users/{id}')
+    @response(204, {
+        description: 'User DELETE success',
+    })
+    async deleteById(@param.path.number('id') id: number): Promise<void> {
+        await this.userRepository.deleteById(id);
+    }
 }
diff --git a/backend/src/models/user.model.ts b/backend/src/models/user.model.ts
index a208338..a36ac0c 100644
--- a/backend/src/models/user.model.ts
+++ b/backend/src/models/user.model.ts
@@ -39,10 +39,10 @@ export class User extends Entity {
   password: string;
 
   @property({
-    type: 'string',
+    type: 'boolean',
     required: true,
   })
-  role: 'admin' | 'teacher' | 'student';
+  isAdmin: boolean;
 
 
   constructor(data?: Partial<User>) {
diff --git a/frontend/src/app/api.service.spec.ts b/frontend/src/app/api.service.spec.ts
new file mode 100644
index 0000000..c0310ae
--- /dev/null
+++ b/frontend/src/app/api.service.spec.ts
@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ApiService } from './api.service';
+
+describe('ApiService', () => {
+  let service: ApiService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(ApiService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});
diff --git a/frontend/src/app/api.service.ts b/frontend/src/app/api.service.ts
new file mode 100644
index 0000000..44aeb83
--- /dev/null
+++ b/frontend/src/app/api.service.ts
@@ -0,0 +1,26 @@
+import {Injectable} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {environment} from '../environments/environment';
+import {LoginService} from './shared/login.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ApiService {
+
+  constructor(private http: HttpClient, private loginService: LoginService) {
+  }
+
+  request(method: 'post' | 'get' | 'delete', url: string, body: any): Promise<any> {
+    return this.http.request(method, environment.backendUrl + url, {
+      body,
+      headers: {Authorization: 'Bearer ' + this.loginService.token}
+    }).toPromise();
+  }
+
+  async logout(): Promise<void> {
+    await this.request('post', '/users/logout', '');
+    this.loginService.token = null;
+    this.loginService.user = null;
+  }
+}
diff --git a/frontend/src/app/app.component.html b/frontend/src/app/app.component.html
index 97b8050..5569e18 100644
--- a/frontend/src/app/app.component.html
+++ b/frontend/src/app/app.component.html
@@ -6,8 +6,7 @@
     <mat-toolbar>Menü</mat-toolbar>
     <mat-nav-list>
       <a mat-list-item routerLink="/">Főoldal</a>
-      <a mat-list-item href="#">Link 2</a>
-      <a mat-list-item href="#">Link 3</a>
+      <a mat-list-item *ngFor="let item of getMenuItems()" [routerLink]="'/' + item.path">{{ item.title }}</a>
     </mat-nav-list>
   </mat-sidenav>
   <mat-sidenav-content>
@@ -22,10 +21,11 @@
       </button>
       <span>Szakdolgozat</span>
       <span class="toolbar-spacer"></span>
-      <span *ngIf="loginService.loggedInUser">
+      <span *ngIf="loginService.token">
+        <span>{{ loginService.user.name }}</span>
         <a mat-button (click)="logout()">Kijelentkezés</a>
       </span>
-      <span *ngIf="!loginService.loggedInUser">
+      <span *ngIf="!loginService.token">
         <a mat-button routerLink="/register">Regisztráció</a>
         <a mat-button routerLink="/login">
           Bejelentkezés
diff --git a/frontend/src/app/app.component.ts b/frontend/src/app/app.component.ts
index 13b1c9c..b2f47fe 100644
--- a/frontend/src/app/app.component.ts
+++ b/frontend/src/app/app.component.ts
@@ -4,6 +4,8 @@ import {Observable} from 'rxjs';
 import {map, shareReplay} from 'rxjs/operators';
 import {LoginService} from './shared/login.service';
 import {Router} from '@angular/router';
+import {ApiService} from './api.service';
+import {UserRole} from './model/user.model';
 
 @Component({
   selector: 'app-root',
@@ -18,15 +20,25 @@ export class AppComponent implements OnInit {
       shareReplay()
     );
 
-  constructor(private breakpointObserver: BreakpointObserver, public loginService: LoginService,
-              private router: Router) {
+  menu: MenuItem[] = [
+    {path: 'subjects', title: 'Tárgyak', requiredRole: 'admin'}
+  ];
+
+  constructor(private breakpointObserver: BreakpointObserver, public loginService: LoginService, private api: ApiService,
+              private router: Router, private login: LoginService) {
   }
 
   ngOnInit(): void {
   }
 
   async logout(): Promise<void> {
-    await this.loginService.logout();
+    await this.api.logout();
     await this.router.navigate(['/']);
   }
+
+  getMenuItems(): MenuItem[] {
+    return this.menu.filter(item => item.requiredRole === 'admin' ? this.login.user?.isAdmin : true); // TODO: Roles
+  }
 }
+
+type MenuItem = { path: string, title: string, requiredRole: UserRole | 'admin' };
diff --git a/frontend/src/app/app.module.ts b/frontend/src/app/app.module.ts
index f08823c..c9c9aa5 100644
--- a/frontend/src/app/app.module.ts
+++ b/frontend/src/app/app.module.ts
@@ -17,10 +17,7 @@ import {MatFormFieldModule} from '@angular/material/form-field';
 import {MatInputModule} from '@angular/material/input';
 import {RegisterComponent} from './register/register.component';
 import {LoginService} from './shared/login.service';
-import {AngularFireModule, FirebaseApp} from '@angular/fire';
-import {AngularFireAuthModule} from '@angular/fire/auth';
-import {AngularFirestoreModule} from '@angular/fire/firestore';
-import {AngularFireDatabaseModule} from '@angular/fire/database';
+import {HttpClientModule} from '@angular/common/http';
 
 @NgModule({
   declarations: [
@@ -43,10 +40,7 @@ import {AngularFireDatabaseModule} from '@angular/fire/database';
     MatFormFieldModule,
     MatInputModule,
     ReactiveFormsModule,
-    AngularFireModule.initializeApp((window as any).firebaseCredentials),
-    AngularFirestoreModule,
-    AngularFireDatabaseModule,
-    AngularFireAuthModule
+    HttpClientModule
   ],
   providers: [
     LoginService
diff --git a/frontend/src/app/login/login.component.html b/frontend/src/app/login/login.component.html
index 9fff068..df59dd0 100644
--- a/frontend/src/app/login/login.component.html
+++ b/frontend/src/app/login/login.component.html
@@ -3,13 +3,16 @@
   <mat-form-field>
     <mat-label>Email</mat-label>
     <input matInput class="mat-input-element" type="email" name="email" required="required"
-           placeholder="h123456@stud.u-szeged.hu" [(ngModel)]="email"/>
+           placeholder="h123456@stud.u-szeged.hu" [formControl]="email" [errorStateMatcher]="matcher"/>
     <mat-hint>Egyetemi email cim</mat-hint>
   </mat-form-field>
   <mat-form-field>
     <mat-label>Jelszó</mat-label>
     <input matInput class="mat-input-element" type="password" name="password" required="required"
-           minlength="8" [(ngModel)]="pass"/>
+           minlength="8" [formControl]="pass" [errorStateMatcher]="matcher"/>
   </mat-form-field>
+  <mat-error *ngIf="matcher.isErrorState(email, null)">
+    A megadott email cim vagy jelszó nem megfelelő
+  </mat-error>
   <button mat-raised-button color="primary" (click)="doLogin()">Bejelentkezés</button>
 </form>
diff --git a/frontend/src/app/login/login.component.ts b/frontend/src/app/login/login.component.ts
index 1a1e8ad..5a5b15f 100644
--- a/frontend/src/app/login/login.component.ts
+++ b/frontend/src/app/login/login.component.ts
@@ -1,6 +1,8 @@
 import {Component, OnInit} from '@angular/core';
 import {Router} from '@angular/router';
 import {LoginService} from '../shared/login.service';
+import {FormErrorStateMatcher} from '../utility/form-error-state-matcher';
+import {FormControl} from '@angular/forms';
 
 @Component({
   selector: 'app-login',
@@ -8,8 +10,9 @@ import {LoginService} from '../shared/login.service';
   styleUrls: ['./login.component.css']
 })
 export class LoginComponent implements OnInit {
-  email: string;
-  pass: string;
+  email = new FormControl('');
+  pass = new FormControl('');
+  matcher = new FormErrorStateMatcher();
 
   constructor(private router: Router, private loginService: LoginService) {
   }
@@ -19,7 +22,15 @@ export class LoginComponent implements OnInit {
   }
 
   async doLogin(): Promise<void> {
-    await this.loginService.login(this.email, this.pass);
-    await this.router.navigate(['/']);
+    if (await this.loginService.login(this.email.value, this.pass.value)) {
+      await this.router.navigate(['/']);
+    } else {
+      this.email.setErrors({
+        login: true
+      });
+      this.pass.setErrors({
+        login: true
+      });
+    }
   }
 }
diff --git a/frontend/src/app/model/user.model.ts b/frontend/src/app/model/user.model.ts
new file mode 100644
index 0000000..161b589
--- /dev/null
+++ b/frontend/src/app/model/user.model.ts
@@ -0,0 +1,7 @@
+export class User {
+  name: string;
+  isAdmin: boolean;
+}
+
+export type UserRole = 'teacher' | 'student';
+
diff --git a/frontend/src/app/register/register.component.html b/frontend/src/app/register/register.component.html
index d12284f..a52a598 100644
--- a/frontend/src/app/register/register.component.html
+++ b/frontend/src/app/register/register.component.html
@@ -16,6 +16,18 @@
       Egyetemi email megadása szükséges
     </mat-error>
   </mat-form-field>
+  <mat-form-field>
+    <mat-label>Teljes név</mat-label>
+    <input matInput [formControl]="nameFormControl" [errorStateMatcher]="matcher"
+           class="mat-input-element" type="text" name="name" required="required"
+           minlength="4"/>
+    <mat-error *ngIf="nameFormControl.hasError('pattern') && !nameFormControl.hasError('required')">
+      A név formátuma nem megfelelő.
+    </mat-error>
+    <mat-error *ngIf="nameFormControl.hasError('required')">
+      A teljes név megadása kötelező.
+    </mat-error>
+  </mat-form-field>
   <mat-form-field>
     <mat-label>Jelszó</mat-label>
     <input matInput [formControl]="passFormControl" [errorStateMatcher]="matcher"
diff --git a/frontend/src/app/register/register.component.ts b/frontend/src/app/register/register.component.ts
index 451ef4a..e9dbb9b 100644
--- a/frontend/src/app/register/register.component.ts
+++ b/frontend/src/app/register/register.component.ts
@@ -1,15 +1,8 @@
 import {Component, OnInit} from '@angular/core';
-import {ErrorStateMatcher} from '@angular/material/core';
-import {AbstractControl, FormControl, FormGroupDirective, NgForm, ValidationErrors, Validators} from '@angular/forms';
+import {AbstractControl, FormControl, ValidationErrors, Validators} from '@angular/forms';
 import {LoginService} from '../shared/login.service';
 import {Router} from '@angular/router';
-
-export class FormErrorStateMatcher implements ErrorStateMatcher {
-  isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {
-    const isSubmitted = form && form.submitted;
-    return !!(control && control.invalid && (control.dirty || control.touched || isSubmitted));
-  }
-}
+import {FormErrorStateMatcher} from '../utility/form-error-state-matcher';
 
 @Component({
   selector: 'app-register',
@@ -27,6 +20,10 @@ export class RegisterComponent implements OnInit {
     RegisterComponent.validateUniEmail
   ]);
 
+  nameFormControl = new FormControl('', [
+    Validators.pattern(/([A-Za-z-.]+ )+[A-Za-z-.]+/)
+  ]);
+
   passFormControl = new FormControl('', [
     Validators.required,
     Validators.minLength(8)
@@ -75,7 +72,7 @@ export class RegisterComponent implements OnInit {
       return;
     }
     try {
-      await this.loginService.createUser(this.emailFormControl.value, this.passFormControl.value);
+      await this.loginService.createUser(this.emailFormControl.value, this.passFormControl.value, this.nameFormControl.value);
       await this.router.navigate(['/']);
     } catch (e) {
       alert(e);
diff --git a/frontend/src/app/shared/login.service.ts b/frontend/src/app/shared/login.service.ts
index 31e44be..2d8b1ff 100644
--- a/frontend/src/app/shared/login.service.ts
+++ b/frontend/src/app/shared/login.service.ts
@@ -1,21 +1,34 @@
 import {Injectable} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {environment} from '../../environments/environment';
+import {User} from '../model/user.model';
 
 @Injectable({
   providedIn: 'root'
 })
 export class LoginService {
 
-  loggedInUser: string; // TODO
+  token: string;
+  user: User;
 
-  constructor() {
+  constructor(private http: HttpClient) {
   }
 
-  async createUser(email: string, pass: string): Promise<void> {
+  async createUser(email: string, password: string, name: string): Promise<void> {
+    await this.http.post(environment.backendUrl + '/users', {email, password, name}).toPromise();
   }
 
-  async logout(): Promise<void> {
-  }
-
-  async login(email: string, pass: string): Promise<void> {
+  async login(email: string, password: string): Promise<boolean> {
+    try {
+      const resp: any = await this.http.post(environment.backendUrl + '/users/login', {email, password}).toPromise();
+      this.token = resp.token;
+      this.user = resp.user;
+      return true;
+    } catch (e) {
+      if (e.status === 401 || e.status === 422) {
+        return false;
+      }
+      throw e;
+    }
   }
 }
diff --git a/frontend/src/app/utility/form-error-state-matcher.ts b/frontend/src/app/utility/form-error-state-matcher.ts
new file mode 100644
index 0000000..c908b0a
--- /dev/null
+++ b/frontend/src/app/utility/form-error-state-matcher.ts
@@ -0,0 +1,9 @@
+import {ErrorStateMatcher} from '@angular/material/core';
+import {FormControl, FormGroupDirective, NgForm} from '@angular/forms';
+
+export class FormErrorStateMatcher implements ErrorStateMatcher {
+  isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {
+    const isSubmitted = form && form.submitted;
+    return !!(control && control.invalid && (control.dirty || control.touched || isSubmitted));
+  }
+}
diff --git a/frontend/src/environments/environment.ts b/frontend/src/environments/environment.ts
index 7b4f817..cb5a97f 100644
--- a/frontend/src/environments/environment.ts
+++ b/frontend/src/environments/environment.ts
@@ -3,7 +3,8 @@
 // The list of file replacements can be found in `angular.json`.
 
 export const environment = {
-  production: false
+  production: false,
+  backendUrl: 'http://localhost:8019'
 };
 
 /*