add logout

api/api/rules.service.ts

             responseType_ = 'text';
         }
 
-        return this.httpClient.get<Array<Rule>>(`${this.configuration.basePath}/rules/admin`,
+        return this.httpClient.get<Array<Rule>>(`${this.configuration.basePath}/rules/admin/all`,
             {
                 responseType: <any>responseType_,
                 withCredentials: this.configuration.withCredentials,

src/app/footer/footer.component.html

     <span [routerLink]="['/admin/create']"> 
       <mat-icon>add</mat-icon>
     </span>
+
+    <span *ngIf="isLogedIn()" (click)="logout()"> 
+      <mat-icon>logout</mat-icon>
+    </span>
 </mat-toolbar>

src/app/footer/footer.component.ts

 import { Component, OnInit } from '@angular/core';
+import { Router } from '@angular/router';
+import { AuthService } from '../auth/service/auth.service';
 
 @Component({
   selector: 'app-footer',
 })
 export class FooterComponent implements OnInit {
 
-  constructor() { }
+  constructor(protected authService: AuthService, protected router: Router) { }
 
   ngOnInit(): void {
   }
 
+  isLogedIn (): boolean {
+    return !!this.authService.user;
+  }
+
+  logout () {
+    this.authService.logout();
+    this.router.navigate(['login']);
+  }
+
 }