使用rest api将数据输入到数据库（登录）

Question

我有一个 API 试图检查用户是否在数据库中。但是，我不确定如何将输入中的数据发布到我的 API 以允许用户登录。HTML 登录页面  <ion-item class='ion-padding'>    <ion-label position="floating">Username (Email)</ion-label>    <ion-input type='text'name="email" #email [(ngModel)]="email"></ion-input>  </ion-item>  <ion-item class='ion-padding'>    <ion-label position="floating">Password</ion-label>    <ion-input type='password'  name="password" #password [(ngModel)]="password"></ion-input>  </ion-item>   <router-outlet></router-outlet></ion-content></ion-app>登录.tsimport { Component } from '@angular/core';import { NavController, AlertController, LoadingController } from '@ionic/angular';import { HttpClient, HttpHeaders } from '@angular/common/http';@Component({  selector: 'app-login',  templateUrl: 'login.page.html',})export class HomePage {  username = '';  password = '';  constructor(    public navCtrl: NavController, public alertCtrl: AlertController,    private http: HttpClient,    private httpH: HttpHeaders,    public loading: LoadingController) { }  }