Usually, the login URL for IAM users is in this format
https://{Account Id}.signin.aws.amazon.com/console
But it is possible to make this URL more memorable and user-friendly.
To achieve this, follow the steps below:
Step 01: Go to IAM Dashboard
Step 02: Click on the Create link that is located right next to the account id:

Step 03: This brings up the Create Account Alias dialog box.

Step 03: Enter your desired alias and save.

If you don’t pick a unique name, you will get an error like this:

and when you choose your unique name, you should see it in effect:
