Customizing IAM Sign-in URL
Normally the login URL for IAM users is in this format
But it is possible to make this URL more memorable and user-friendly.
In order to achieve this, click on the Customize link which is to the right of the link:
This brings up the Create Account Alias dialog box. Since the name we provide is used in the URL it needs to be unique globally.
If you click on Customize again it asks if you would like to delete the alias and use the account number again. This way you can revert your changes.