Setting up a new Globus Online Account
To use Globus Online, you must first have a Globus Online account. That account is separate from your account on Blue Waters but you can "link" your GO account to your portal account so you can go to Globus Online using any of them to login to Globus and access and manage your data. See the Globus Online page "Linking Identities" for more information.
If you're just creating your Globus Online account, that creation goes as follows:
Log into to the Blue Waters portal as usual, with your username and NCSA Kerberos password and then complete the Duo two-factor authentication..
Go to Globus Online by pulling down the "Using Blue Waters -> Data" tab (under the "Resources" category) and clicking "Globus Online".
You'll authenticate again. This will probably ask for your username and "password" again using your username and NCSA Kerberos password and then complete the Duo two-factor authentication.
You'll tell it to connect to your Globus Online Account, and you'll be given the option of creating a Globus Online account. Follow that procedure to create the new account. During this process, select the option to "link" your new Globus Online account to your portal account.
Once the Globus Online account is set up, when you click on the Globus Online from within the Blue Waters portal, you can just authenticate with the same information as you log in to the portal with.