import type { SignOptions } from 'jsonwebtoken';
import * as jwt from 'jsonwebtoken';
import { Authenticator } from '../../interfaces/authenticator';
import { AuthUser, AuthenticatedUser } from '../..';
export type AuthenticatorOptions = {
    jwt: SignOptions;
    secret: string;
};
export type JWTPayload = jwt.JwtPayload & {
    preferred_username: string;
};
export declare class JWTAuthenticator implements Authenticator {
    protected options: AuthenticatorOptions;
    constructor(options: AuthenticatorOptions);
    createToken(user: AuthUser): string;
    verifyToken(token: string): AuthenticatedUser;
}