import { Next, Provider } from '@loopback/core';
import { Middleware, MiddlewareContext } from '@loopback/rest';
import { AuthenticateFn, IAuthUser } from '../types';
export declare class UserAuthenticationMiddlewareProvider implements Provider<Middleware> {
    private authenticateUser;
    constructor(authenticateUser: AuthenticateFn<IAuthUser | undefined>);
    value(): (ctx: MiddlewareContext, next: Next) => Promise<import("@loopback/core").NonVoid>;
}