added email change strategies

lib/User/Query/UserQuery.php

@@ -6,6 +6,11 @@ use yii\db\ActiveQuery;
 
 class UserQuery extends ActiveQuery
 {
+    /**
+     * @param $usernameOrEmail
+     *
+     * @return $this
+     */
     public function whereUsernameOrEmail($usernameOrEmail)
     {
         return filter_var($usernameOrEmail, FILTER_VALIDATE_EMAIL)
@@ -13,18 +18,44 @@ class UserQuery extends ActiveQuery
             : $this->whereUsername($usernameOrEmail);
     }
 
+    /**
+     * @param $email
+     *
+     * @return $this
+     */
     public function whereEmail($email)
     {
         return $this->andWhere(['email' => $email]);
     }
 
+    /**
+     * @param $username
+     *
+     * @return $this
+     */
     public function whereUsername($username)
     {
         return $this->andWhere(['username' => $username]);
     }
 
+    /**
+     * @param $id
+     *
+     * @return $this
+     */
     public function whereId($id)
     {
         return $this->andWhere(['id' => $id]);
     }
+
+
+    /**
+     * @param $id
+     *
+     * @return $this
+     */
+    public function whereNotId($id)
+    {
+        return $this->andWhere(['<>', 'id', $id]);
+    }
 }