To create an additional administrator in your AWS account, follow the below steps
- Login to your AWS Management Console
https://console.aws.amazon.com/ - Search for the "IAM" service
- In the left navigation panel, select "Users".
- Choose "Add User"
- Provide the User Name, Access type, and Password
- Choose the option "Attach Existing Policies Directly" and select "Administrator Access"
- Review the Settings in the next screen
- On choosing the option "Create User" this will now create a new user with the administrator rights
- On successful creation of the user, the portal allows you to down the credentials and share to the user via the send email link.
- Optionally, you can customize the sign in URL before sending the details, by navigating to the IAM dashboard and selecting the option Customize under "IAM Users Sign-In Link"
https://console.aws.amazon.com/iam/home