import { IAuthenticationService } from "./IAuthenticationService";
import * as msal from "@azure/msal-node";
export declare class NodeAppOnlyAuthenticationService implements IAuthenticationService {
    protected clientId: any;
    protected clientSecret: any;
    protected authority: string;
    protected msalConfig: any;
    protected clientApp: msal.ConfidentialClientApplication;
    constructor(clientId: any, clientSecret: any, authority?: string);
    logout(): Promise<void>;
    clearCache(): Promise<void>;
    isAuthenticated(): Promise<boolean>;
    getAccessToken(resource: string): Promise<string>;
}