object user.unblock(array userids)
This method allows to unblock users.
This method is only available to Super admin user type. Permissions to call the method can be revoked in user role settings. See User roles for more information.
(array) IDs of users to unblock.
(object) Returns an object containing the IDs of the unblocked users under the
Unblock two users.
CUser::unblock() у ui/include/classes/api/services/CUser.php.