Godaddy NopCommerce Login issue

I never even created a username and password for the app when it installed can anyone help me?

I believe:

Username should be the e-mail
Password should be "admin"

justinking1994 wrote:

when you do a successful install, in the last  step of installation it asks you whether you want to change the administrator login credentials or not.

These are the default credentials:
username: [email protected]
password: admin

did you change the default login credentials ? If no then try login with these default credentials