Angular HTTP Interceptor

so_angular_http_inteceptor.ts

import { Injectable } from '@angular/core';
import {
  HttpRequest,
  HttpResponse,
  HttpHandler,
  HttpEvent,
  HttpInterceptor,
  HttpErrorResponse
} from '@angular/common/http';
import { Observable, EMPTY, throwError } from 'rxjs';
import { switchMap, catchError } from 'rxjs/operators';
import { Router } from '@angular/router';
import {AngularFireAuth} from 'angularfire2/auth';

@Injectable()
export class TokenInterceptor implements HttpInterceptor {
  constructor(private afAuth: AngularFireAuth) {}

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    if (request.url.includes('api.imgur.com')) {
      return next.handle(request);
    } else {
      return this.afAuth.idToken
        .pipe(switchMap((token) => {
          const config = {
            setHeaders: {
              Authorization: `Bearer ${token}`
            }
          };
          const user = JSON.parse(localStorage.getItem('user'));
          if (user && user.activeGroup) {
            config['url'] = request.url.replace(':groupid', user.activeGroup.id);
          }
          const reqClone = request.clone(config);
          return next.handle(reqClone);
        }));
    }
  }
}


@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
  constructor(private afAuth: AngularFireAuth, private router: Router) {}

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    return next.handle(request).pipe(catchError(err => {
      if (err.status === 401) {
        // auto logout if 401 response returned from api
        localStorage.removeItem('user');
        // this.afAuth.auth.signOut();
        // location.reload(true);
      } else if (err.status === 403) {
        this.router.navigate(['/unauthorized']);
      } else if (err.status === 500) {
        err.statusText = 'Oops';
        err.error.error.message = 'Something went wrong!';
      }
      const error = {
        title: err.statusText || 'Oops!',
        message: err.error.error.message || 'Something went wrong!'
      };
      return throwError(error);
    }));
  }
}

should take(1) instead of continuing to subscribe at line #47