update models + added social network account services

lib/User/Query/UserQuery.php

@@ -6,5 +6,20 @@ use yii\db\ActiveQuery;
 
 class UserQuery extends ActiveQuery
 {
+    public function whereUsernameOrEmail($usernameOrEmail)
+    {
+        return filter_var($usernameOrEmail, FILTER_VALIDATE_EMAIL)
+            ? $this->whereEmail($usernameOrEmail)
+            : $this->whereUsername($usernameOrEmail);
+    }
 
+    public function whereEmail($email)
+    {
+        return $this->andWhere(['email' => $email]);
+    }
+
+    public function whereUsername($username)
+    {
+        return $this->andWhere(['username' => $username]);
+    }
 }