我尝试使用ionic/ngx相机制作一个带有ionic-angular的应用程序，但是尽管在module.ts部分添加了相机提供程序，我还是不断收到这个错误。
This is the error
这是我的模块

import { NgModule } from '@angular/core';
    import { BrowserModule } from '@angular/platform-browser';
    import { RouteReuseStrategy } from '@angular/router';

    import { IonicModule, IonicRouteStrategy } from '@ionic/angular';

    import { AppComponent } from './app.component';
    import { AppRoutingModule } from './app-routing.module';

    import { IonicStorageModule } from '@ionic/storage-angular';
    import {AuthGuardService} from './services/auth-guard.service';
    import {AuthenticationService} from './services/authentication.service';
    import {Storage} from '@ionic/Storage';
    import { HttpClientModule } from '@angular/common/http';
    import { QRCodeModule } from 'angularx-qrcode';
    **import { Camera } from '@ionic-native/camera/ngx';**

    @NgModule({
    declarations: [AppComponent],
    imports: [ BrowserModule, IonicModule.forRoot(), AppRoutingModule,IonicStorageModule.forRoot(),                         QRCodeModule],
    providers: [{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy }, **Camera**],
    bootstrap: [AppComponent],
    })
    export class AppModule {}

我想采用的方法是这样的

export class PhotoService{
  constructor(private camera: Camera){}



    takePicture(){
      const fotito = Image;
      const options: CameraOptions ={
        quality: 100,
        destinationType: this.camera.DestinationType.DATA_URL,
        encodingType: this.camera.EncodingType.JPEG,
        mediaType: this.camera.MediaType.PICTURE,
      }

    this.camera.getPicture(options).then((imageData) => {imageData= fotito

    },(err) =>{console.log('Problemas de camara' + err);

  })
  return(fotito);
 }
}