You could read some links below It might guide you to reset your AWS Root password and after that you can follow some steps to close your AWS Account.
Resetting lost or forgotten passwords or access keys for AWS
Read Section - AWS account root user password – If you forget your root user password, you can reset the password from the AWS Management Console. For details, see Resetting a lost or forgotten root user password later in this topic
How do I close my AWS account? https://aws.amazon.com/premiumsupport/knowledge-center/close-aws-account/
Short description Before closing your AWS account, do the following:
Review the following account considerations for closing your account. Review the following billing considerations for closing your account. Be sure to terminate all resources before closing your account. Be sure to pay your outstanding bills.
I have forgotten the credentials to this account including the email address.
Can I see help from one of aws engineers , pls?
I managed to locate the credentials.
Thanks to those who replied.
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