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AWS console sign in error 400 bad request after password and before MFA

I cannot sign into AWS account. The AWS management console accepts password but then throws 400 error before getting to MFA. Link to Support takes me to login again, haha. I cleared cache and cookies for all of time. I tried different browsers and devices. enter image description here

Solution

  • According to AWS support, they said that I have two AWS accounts. That means my Amazon.com account also counts as an AWS account I guess. Both have the same email address, e.g. myemail@gmail.com. Therefore, the below StackOverflow link fixed my issue.

    • I just had to modify my Amazon.com email to include +amazon so if it was myemail@gmail.com, then I needed to change it to myemail+amazon@gmail.com. Do this by logging into Amazon.com, then navigate to Your Account > Login & security
    • Don't worry, you don't actually need to create an email for myemail+amazon@gmail.com
    • Seems like Amazon.com removes the +amazon and continues to treat it as myemail@gmail.com as far as I've noticed so far. You are still even allowed to log into Amazon.com with myemail@gmail.com without adding the +amazon

    After doing this, I was able to log into AWS account as usual. =)

    Source: https://stackoverflow.com/a/57104601