No login link on the page you get to when you are not logged in and try to go to the app. Then click on sign up. Then click on login. Then click on login again. Then click on I was a customer before. Then click on login with github. Really?
What cookie controls do you have in place?
I have a bookmark to my Dashboard and between the cookies set by CircleCI and OAuth from bitbucket I do not have to deal with a re-auth every time I access the Dashboard.