private configureOptions(){
        this.currentUser = this.authenticationService.currentUserValue;
        this.httpOptions = {
          headers: new HttpHeaders(),
          responseType: 'blob' as 'json'
        };
        this.httpOptions.headers = this.httpOptions.headers.append('Authorization-User', this.currentUser['id']);
        this.httpOptions.headers = this.httpOptions.headers.append('Authorization-Company', this.currentUser.company['id']);
        this.httpOptions.headers = this.httpOptions.headers.append('Content-Type', 'application/json');
    }

    private handleError<T> (operation = 'operation', result?: T) {
        return (error: any): Observable<T> => {

        // TODO: send the error to remote logging infrastructure
        console.error(error); // log to console instead

        // Let the app keep running by returning an empty result.
        return of(result as T);
        };
    }

    //////////////////////////// ///////////////////// ////////////////////

    loadReport (filterVM: any): Observable<any> {

        ////////// ////////////////////////

        return this.http.post<any>(apiUrl + "/Report/Load", filterVM, this.httpOptions).pipe(
          tap((filterVM: any) => console.log(`loading report`)),
          catchError(this.handleError<any>('loadReport'))
        );
    }