import { TwitterAuthOptions, TwitterGuestAuth } from './auth';
import { Headers } from 'headers-polyfill';
/**
 * A user authentication token manager.
 */
export declare class TwitterUserAuth extends TwitterGuestAuth {
    constructor(bearerToken: string, options?: Partial<TwitterAuthOptions>);
    isLoggedIn(): Promise<boolean>;
    login(username: string, password: string, email?: string): Promise<void>;
    logout(): Promise<void>;
    installTo(headers: Headers, url: string): Promise<void>;
    private executeFlowTask;
}
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