If you are seeing repeated challenges to your successful login, one after another, then you are in a challenge loop. This can occur when you are changing the login context while you are confirming your login attempt.
To overcome the challenge loop, remain on the login page where you were just challenged and use a new browser tab or a different device to perform the login confirmation.
It is also important to note that login challenges are only active for a short time. If you are continuously being challenged, it may be that your login session or challenge session is timing out.