Move login attempt to separate method to make it easier to alter logi…

…n attempt logic without the need to override the entire login() method. For example to chang credentials or add other params

src/Illuminate/Foundation/Auth/AuthenticatesUsers.php

@@ -39,9 +39,7 @@ public function login(Request $request)
             return $this->sendLockoutResponse($request);
         }
 
-        $credentials = $this->credentials($request);
-
-        if ($this->guard()->attempt($credentials, $request->has('remember'))) {
+        if ($this->attemptLogin($request)) {
             return $this->sendLoginResponse($request);
         }
 
@@ -66,6 +64,17 @@ protected function validateLogin(Request $request)
         ]);
     }
 
+    /**
+     * @param Request $request
+     * @return bool
+     */
+    protected function attemptLogin(Request $request)
+    {
+        $credentials = $this->credentials($request);
+
+        return $this->guard()->attempt($credentials, $request->has('remember'));
+    }
+
     /**
      * Get the needed authorization credentials from the request.
      *