import { AuthenticationMethodService } from '../../authentication-method.service';
import { Credentials } from '../../../models/credentials';
import { Observable } from 'rxjs';
import { UserResource } from '../../../../resources/interface/user-resource';
import * as i0 from "@angular/core";
export declare class NullAuthenticationService extends AuthenticationMethodService {
    constructor();
    login(credentials: Credentials): Observable<UserResource>;
    logout(): Observable<object>;
    static ɵfac: i0.ɵɵFactoryDeclaration<NullAuthenticationService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NullAuthenticationService>;
}