Good Morning mkleinhaus,

What firmware are you running? 

You could try to reset the switch, as long as you have backed up your configuration 

somewhere. (Or if you don't care about losing the current settings on the switch)

If you are entering the credentials of a user account you created, try the default "admin"

user account. The login credentials are cisco as the username and cisco for the password.

Here is a link to the Quick Start guide regarding any more questions you may have:

http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbss/sf20x_sg20x/quick_start/guide/ML/78-19596-01.pdf

Please let me know if this helps, and if you have any other questions.

Thanks,

Rocket