问角6-链式API调用不被触发

EN

  requestAuthCode(request: models.AuthenticationRequest): Observable<any> {
    return this.httpClient
      .get<any>(environment.auth.authorize, {
        headers: headers,
        params: params
      })
      .pipe(
        tap(val => this.authenticate(val.code)),
        catchError(error => this.handleError(error))
      );
  }

  authenticate(code: string): Observable<any> {
    return this.httpClient
      .post<models.AuthenticationTokenResponse>(
        environment.auth.token,
        null,
        {
          headers: headers,
          params: params
        }
      )
      .pipe(
        tap(data => this.setSession(data)),
        catchError(error => this.handleError(error))
      );
  }

this.authService.requestAuthCode(request)
        .subscribe(
          data =>  {
            console.log(data);
          }