Centralize Access Management with IAM Roles:

Create roles in the testing and production accounts with permissions specific to resources in those accounts.

Add a policy that allowssts:AssumeRolefor trusted accounts.

Establish Trust Between Accounts:

Update the trust policies of the roles in the testing and production accounts to allow the roles in the development account to assume them.

Example Trust Policy:

{

"Version": "2012-10-17",

"Statement": [

{

"Effect": "Allow",

"Principal": {

"AWS": "arn:aws:iam:::role/"

},

"Action": "sts:AssumeRole"

}

]

}

Role Switching for Access:

Developers in the development account can use the AWS Management Console or CLI to assume the roles in the testing or production accounts.

Advantages of This Solution:

Scalability: No need to create individual credentials for each developer in every account.

Security: Credentials are dynamically assumed and not shared across accounts.

Ease of Management: Centralized role management simplifies permissions and reduces administrative overhead.

Cross-Account Access in AWS

Using Roles to Delegate Permissions

IAM Policies and Trust Relationships