Merge pull request #1098 from CakeDC/issue/1096-bug-in-social-behavio…

…r-cake4

#1096: fixed `findExistingForSocialLogin` finder

src/Model/Behavior/SocialBehavior.php

@@ -16,6 +16,7 @@
 use Cake\Core\Configure;
 use Cake\Datasource\EntityInterface;
 use Cake\Event\EventDispatcherTrait;
+use Cake\ORM\Query;
 use Cake\Utility\Hash;
 use CakeDC\Users\Exception\AccountNotActiveException;
 use CakeDC\Users\Exception\MissingEmailException;
@@ -138,7 +139,6 @@ protected function _createSocialUser($data, $options = [])
         $useEmail = $options['use_email'] ?? null;
         $validateEmail = $options['validate_email'] ?? null;
         $tokenExpiration = $options['token_expiration'] ?? null;
-        $existingUser = null;
         $email = $data['email'] ?? null;
         if ($useEmail && empty($email)) {
             throw new MissingEmailException(__d('cake_d_c/users', 'Email not present'));
@@ -276,8 +276,15 @@ public function generateUniqueUsername($username)
      * @param array $options Find options with email key.
      * @return \Cake\ORM\Query
      */
-    public function findExistingForSocialLogin(\Cake\ORM\Query $query, array $options)
+    public function findExistingForSocialLogin(Query $query, array $options)
     {
+        if (!array_key_exists('email', $options)) {
+            throw new MissingEmailException(__d('cake_d_c/users', 'Missing `email` option in options array'));
+        }
+        if (!$options['email']) {
+            return $query->where('1 != 1');
+        }
+
         return $query->where([
             $this->_table->aliasField('email') => $options['email'],
         ]);