import { IAuthConfig } from './types/AuthConfig';
import { AuthCredential } from './models/data/AuthCredential';
import { AccountCredential } from './models/data/AccountCredential';
/**
 * This class deals with authenticating against Twitter API.
 */
export declare class Auth {
    /** The HTTPS Agent to use for requests to Twitter API. */
    private readonly httpsAgent;
    /** The order in which the login subtasks must be executed. */
    private subtasks;
    /**
     * @param config - The config object.
     */
    constructor(config?: IAuthConfig);
    /**
     * @param subtask - The name of the subtask.
     * @param flowToken - The flow token for the subtask.
     * @param accCred - The account credentials to the Twitter account.
     *
     * @returns The appropriate payload for the given subtask.
     */
    private getSubtaskPayload;
    /**
     * Executes the given login subtask.
     *
     * @param url - The URL against which the subtask is to be executed.
     * @param payload - The payload to be sent.
     *
     * @returns The response received from executing the subtask.
     */
    private executeSubtask;
    /**
     * Parses the incoming authentication error from Twitter API into a simplified message.
     *
     * @param error - The incoming error.
     * @param flowName - The flow that was executed, which raised this error.
     *
     * @returns The simplified error message.
     */
    private parseAuthError;
    /**
     * @returns A new 'guest' credential.
     */
    getGuestCredential(): Promise<AuthCredential>;
    /**
     * @param accCred - The credentials (email, username and password) to the Twitter account.
     *
     * @returns The 'user' credentials for the given Twitter account.
     */
    getUserCredential(accCred: AccountCredential): Promise<AuthCredential>;
}