User destroy fix - Admin role checked properly

app/Http/Controllers/UserController.php

@@ -151,11 +151,17 @@ class UserController extends Controller {
      * @return \Illuminate\Http\Response
      */
     public function destroy(User $user) {
-        //check if the current user is admin, then if there is only one admin - don't delete
+
+        $adminRole = Role::where('slug','admin')->first();
+        $userRoles = $user->roles;
+
+        if ($userRoles->contains($adminRole)) {
+            //the current user is admin, then if there is only one admin - don't delete
             $numberOfAdmins =  Role::where('slug', 'admin')->first()->users()->count();
             if (1 == $numberOfAdmins) {
                 return response(['error' => 1, 'message' => 'Create another admin before deleting this only admin user'], 409);
             }
+        }
 
         $user->delete();