Fix Call to undefined method Zizaco\Entrust\Entrust::ability() 5.1

src/Entrust/Entrust.php

@@ -61,6 +61,23 @@ public function can($permission, $requireAll = false)
         return false;
     }
 
+    /**
+     * Check if the current user has a role or permission by its name
+     *
+     * @param array|string $roles            The role(s) needed.
+     * @param array|string $permissions      The permission(s) needed.
+     * @param array $options                 The Options.
+     *
+     * @return bool
+     */
+    public function ability($roles, $permissions, $options = [])
+    {
+        if ($user = $this->user()) {
+            return $user->ability($roles, $permissions, $options);
+        }
+        return false;
+    }
+
     /**
      * Get the currently authenticated user or null.
      *