<?php
 
 namespace Illuminate\Contracts\Auth;
 
 interface UserProvider
 {
     /**
      * Retrieve a user by their unique identifier.
      *
      * @param  mixed  $identifier
      * @return \Illuminate\Contracts\Auth\Authenticatable|null
      */
     public function retrieveById($identifier);
 
     /**
      * Retrieve a user by their unique identifier and "remember me" token.
      *
      * @param  mixed  $identifier
      * @param  string  $token
      * @return \Illuminate\Contracts\Auth\Authenticatable|null
      */
     public function retrieveByToken($identifier, $token);
 
     /**
      * Update the "remember me" token for the given user in storage.
      *
      * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
      * @param  string  $token
      * @return void
      */
     public function updateRememberToken(Authenticatable $user, $token);
 
     /**
      * Retrieve a user by the given credentials.
      *
      * @param  array  $credentials
      * @return \Illuminate\Contracts\Auth\Authenticatable|null
      */
     public function retrieveByCredentials(array $credentials);
 
     /**
      * Validate a user against the given credentials.
      *
      * @param  \Illuminate\Contracts\Auth\Authenticatable  $user
      * @param  array  $credentials
      * @return bool
      */
     public function validateCredentials(Authenticatable $user, array $credentials);
 }