Fatal error: Uncaught SoapFault exception: [Client] Function ("userExists") is not a valid method for this service in /var/www/html/odotrack_us.php:51 Stack trace: #0 /var/www/html/odotrack_us.php(51): SoapClient->__call('userExists', Array) #1 /var/www/html/odotrack_us.php(51): SoapClient->userExists(Object(stdClass)) #2 {main} thrown in /var/www/html/odotrack_us.php on line 51