We are unable to log in to restaurant backend

My client has bought restaurant theme, we are unable to log in to back end of joomla to customize the website as per our requirement.

While installing, we have set credentials as selectdinersclub.webverticaldomains.com/Restaurant/
*****

But still we are not able to log in to back end. Could you please help with us by letting us know the user name and password.

Hello Sid,
Please try to set it up again. And do not forget to note the username/password you use while installing the package.