Remove unnecessary overwrite

Author: stevebauman

src/Middleware/WindowsAuthenticate.php

@@ -45,6 +45,7 @@ public function handle(Request $request, Closure $next)
         // Retrieve the SSO login attribute.
         $auth = $this->getWindowsAuthAttribute();
 
+        // Retrieve the SSO input key.
         $key = key($auth);
 
         // Handle Windows Authentication.
@@ -56,9 +57,6 @@ public function handle(Request $request, Closure $next)
             // Create a new user LDAP user query.
             $query = $this->newAdldapUserQuery();
 
-            // Get the input key
-            $key = key($auth);
-
             // Filter the query by the username attribute
             $query->whereEquals($key, $username);