Deluge
what about the username. connection manager requires a username and a password, it is not the webui, and it is not the webui password.
you will need to go and make a user in the GTK UI natively in the daemon section of preference, or open the auth file, and see the localclient:password-hash:## and use
hostname: your host
user: localclient
password: password-hash-here
Otherwise, use the username and password that you add if you do it that route.
YOU HAVE TO EDIT ALL OF THE VALUES, alternatively you can delete the host you added, and then readd it. But when you readd it you have to enter ALL OF THE VALUES.
You cannot miss any, you cannot typo any. When it prompts you it does not save and use that prompts password if it mismatched.
You said hostname and password, you're missing the username, which leads me to think you're using webui credentials to access the RPC server.