core.js:6228 ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(SignupPageModule)[AuthService -> AuthService -> AuthService -> Http -> Http -> Http]: NullInjectorError: No provider for Http! code example
Example 1: NullInjectorError: No provider for HttpClient!
@NgModule({
...
imports:[ HttpClientModule ]
...
})Example 2: No provider for HttpClient!
import { HttpClientModule } from '@angular/common/http';