import { HttpService } from "@nestjs/axios";
import { ConfigModule } from "./config/config.module";
import { SelectedFields } from "./types/selected-fields.type";
import { Fields } from "./types/fields.type";
export declare class FacebookAuthService {
    private readonly configModule;
    private readonly httpService;
    constructor(configModule: ConfigModule, httpService: HttpService);
    getUser<T extends Fields>(accessToken: string, ...fields: T[]): Promise<SelectedFields<T>>;
    private getUserFields;
    private userValidate;
    private getAppToken;
}