Check already implemented in core/settings/ajax/changedisplayname.php
*/
public function setDisplayName($displayName) {
$displayName = trim($displayName);
- if ($this->canChangeDisplayName() && !empty($displayName)) {
+ if ($this->backend->implementsActions(\OC_USER_BACKEND_SET_DISPLAYNAME) && !empty($displayName)) {
$this->displayName = $displayName;
$result = $this->backend->setDisplayName($this->uid, $displayName);
return $result !== false;