I am having the same problem. I'm new to GM2; helping a colleague with releases to app stores. How does one disable 2-step authentication? I don't find any option for this in the site settings or in the app. Interestingly, I'm working on a Mac, but if I run GM2 in Windows, I don't encounter this problem (I encounter others because I have not provisioned my Windows setup with the dependencies I have already on my Mac).