I have no idea how to provide credentials to Honolulu so I can use this tool. I am a domain admin so i'm surprised my own account isn't credentials enough. Is Honolulu acting as a proxy between me and all the servers? What do I do to easily get rid of this message so I can manage these servers?
If you click on the text saying credentials needed the right-hand side of the window should pop up with a logon box. enter your credentials and make sure you tick the use for all servers (something like that) checkbox.
If you are deploying Project Honolulu as a service, in order to use the "use my windows credentials" option, you must configure some kind of Kerberos delegation between the Honolulu gateway server and the managed node.