fix for renamed function. closes cosmocode#91

Author: splitbrain

auth.php

@@ -294,7 +294,13 @@ protected function addUser(&$uinfo, $servicename) {
  * @return bool|string
  */
  protected function getUserByEmail($mail) {
- if($this->users === null) $this->_loadUserData();
+ if($this->users === null){
+ if(is_callable([$this, '_loadUserData'])) {
+ $this->_loadUserData();
+ } else {
+ $this->loadUserData();
+ }
+ }
  $mail = strtolower($mail);
 
  foreach($this->users as $user => $uinfo) {