Now that you've signed in to your Amazon One account, secure your account.
To secure your AWS account root user
Sign in to the AWS Management Console as the account owner by choosing Root user and entering your AWS account email address.
On the next page, enter your password.
For help signing in by using root user, see Signing in as the root user in the AWS Sign-In User Guide.
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Turn on multi-factor authentication (MFA) for your root user.
For instructions, see Enable a virtual MFA device for your AWS account root user (console) in the IAM User Guide.