When setting up S3 initially there maybe a possibility whereby a user may lock an account out with 3 failed attempts. When there is no Admin account setup there is no way to access to the console.You will need to run a script to reset account roles.
Please take a backup of the S3 Database before attempting to run the script
Set UserStatusID = 2,
LoginAttempts = 0
Run the following script on the S3 Database
This will let you re-access the account which has been blocked