Added missing config option.

Author: stevebauman

src/Config/auth.php

@@ -122,6 +122,34 @@
 
     'login_attribute' => env('ADLDAP_LOGIN_ATTRIBUTE', 'samaccountname'),
 
+    /*
+    |--------------------------------------------------------------------------
+    | Windows Auth Attribute
+    |--------------------------------------------------------------------------
+    |
+    | This array represents how a user is found when
+    | using the Windows Auth Middleware.
+    |
+    | The key of the array represents the attribute that the user is located by.
+    |
+    |     For example, if 'samaccountname' is the key, then your LDAP server is
+    |     queried for a user with the 'samaccountname' equal to the
+    |     $_SERVER['AUTH_USER'] variable.
+    |
+    |     If a user is found, they are imported into your
+    |     local database, then logged in.
+    |
+    | The value of the array represents the 'key' of the $_SERVER
+    | array to pull the users username from.
+    |
+    |    For example, $_SERVER['AUTH_USER'].
+    |
+    | This must be an array with a key - value pair.
+    |
+    */
+
+    'windows_auth_attribute' => ['samaccountname' => 'AUTH_USER'],
+
     /*
     |--------------------------------------------------------------------------
     | Bind User to Model