Which solution will meet these requirements in the MOST operationally efficient way?
Configure IAM roles for each developer and grant access individually.
Configure permission sets in AWS IAM Identity Center to grant access to the accounts.
Share AWS access keys with the development team for direct repository access.
Use public SSH keys for authentication to the CodeCommit repositories.
Explanations:
While configuring IAM roles for each developer could provide access, it requires individual management for each developer, making it less operationally efficient, especially with a growing team.
Using AWS IAM Identity Center allows for centralized management of permissions and roles across multiple AWS accounts, making it scalable and operationally efficient for a geographically dispersed team.
Sharing AWS access keys poses a significant security risk, as it can lead to unauthorized access and makes it difficult to manage and revoke access when needed.
Using public SSH keys requires each developer to manage their own keys, which can complicate access and maintenance. It also lacks the centralized management benefits of IAM Identity Center.
I arrange that the answer is:
Configure permission sets in AWS IAM Identity Center to grant access to the accounts.