未将投递请求发送到服务器

我正在尝试将数据发布到我从表单中提取的API。

问题是它根本不会尝试发送邮件请求。寄存器.component.ts:

import { Component, OnInit } from '@angular/core';
import { RegisterService } from '../register.service';
import { FormGroup, FormBuilder, FormControl, Validators, FormArray, ReactiveFormsModule } from '@angular/forms';
import { user } from '../user'
@Component({
  selector: 'app-register',
  templateUrl: './register.component.html',
  styleUrls: ['./register.component.css']
})
export class RegisterComponent implements OnInit {
  public myForm: FormGroup;
  public submitted: boolean;
  public events: any[] = [];

  constructor(private registerService: RegisterService, 
  private _fb: FormBuilder) { }

  ngOnInit() {
    this.myForm = new FormGroup({
      username: new FormControl('', [<any>Validators.required, <any>Validators.minLength(5)]),
      email: new FormControl('', [<any>Validators.required, <any>Validators.minLength(5)]),
      org_number: new FormControl('', [<any>Validators.required, <any>Validators.minLength(5)]),
      password: new FormControl('', [<any>Validators.required, <any>Validators.minLength(8)])
    });
  }

  save(model: user, isValid: boolean){
    this.submitted = true;
    this.registerService.postUser(model)
    console.log(model, isValid)
  }

以及它所呼叫的服务:

import { Injectable } from '@angular/core';
import { user } from './user';
import { Observable, of } from 'rxjs';
import { map, catchError } from 'rxjs/operators'
import { HttpClient, HttpHeaders } from '@angular/common/http';

const HttpOptions = {
  headers: new HttpHeaders({ 'Content-type': 'application/json' })
};
const HttpOption2 = {
  headers: new HttpHeaders({ 'Content-type': 'application/x-www-form-urlencoded' })
}
@Injectable({
  providedIn: 'root'
})
export class RegisterService {

  private usersUrl= 'api/v1/accounts';

  constructor(
    private http: HttpClient,

  ) { }

  getUsers(): Observable<user[]> {
    return this.http.get<user[]>(this.usersUrl)
  }
  postUser(object): Observable<user[]>{
    console.log(object)
    console.log('Did it enter this?')
    return this.http.post<user[]>(this.usersUrl, user, HttpOptions)
  }
}

我的代码输出预期信息:用户名:'username',电子邮件:'email'等。

我知道它调用这个函数,因为它也输出:“它输入这个吗?”.

我的API没有收到post请求,我不知道为什么。我一直在寻找关于 official angular Httpclient 页面,以及大量的堆栈溢出文章,我尝试了添加.subscribe,但我得到了错误类型订阅不可分配给类型可观测用户,如果我添加.map(),我得到的映射在类型可观测用户上不存在,如果我添加.pipe(),我不会得到错误消息,但仍然没有post-requiresT 如果我加上管道( catchError(this.handleError('addHero',hero))。 ; 我得到的类型可观察用户不可分配给类型可观察用户。有什么想法吗?