Username and Password

[henry bible]

I feel an idiot asking this but set up Jira core on a server did not set the email facility as did not have the details at the time. 

Now need to login but have not set up username or password  is there a default admin account ?

[Nic Brough -Adaptavist-]

The default admin account is the one you set up during install.

Have a look through https://confluence.atlassian.com/jira/retrieving-the-jira-administrator-192836.html