bad input method

src/Utils/LuBusiness.php

@@ -67,6 +67,14 @@ abstract class LuBusiness {
         abort(404, $reason);
     }
 
+    /**
+     * @param string
+     */
+    public static function badInput($reason = 'Invalid user input')
+    {
+        abort(400, $reason);
+    }
+
     /**
      * @param $param string
      * @param $values string[]