From the Globus team:
On February 13th, 2016, we’re changing the way you access the Globus service, allowing you to log into Globus without having to create a Globus username and password. As previously announced, the Globus service will be unavailable for a few hours while we complete this major upgrade. When service resumes, you may select your institution from a list on the Globus login page and use your institutional username and password to log into Globus – if you typically log in with a Globus username and password, you can continue to do so by selecting “Globus ID” from this list. More information about this change is available on our blog. Please contact firstname.lastname@example.org if you have any questions or concerns.