What is the MOST secure way to provide this access?
Create one IAM user in the production account. Grant the appropriate permissions to the resources that are needed. Share the password only with the users that need access.
Create cross-account access with an IAM role in the developer account. Grant the appropriate permissions to this role. Allow users in the developer account to assume this role to access the production resources.
Create cross-account access with an IAM user account in the production account. Grant the appropriate permissions to this user account. Allow users in the developer account to use this user account to access the production resources.
Create cross-account access with an IAM role in the production account. Grant the appropriate permissions to this role. Allow users in the developer account to assume this role to access the production resources.
Explanations:
Creating a single IAM user in the production account and sharing the password is not secure, as it involves manual password sharing and lacks proper access controls or auditing.
Creating cross-account access with an IAM role in the developer account is incorrect because the role should be in the production account, not the developer account, to allow users to access resources in the production account.
Using an IAM user in the production account and allowing users in the developer account to use this user account is insecure and cumbersome because it involves sharing credentials and lacks a proper role-based access control model.
Creating cross-account access with an IAM role in the production account allows for secure, controlled access. Users in the developer account can assume this role without needing to share credentials, following the principle of least privilege.
I plan that the answer is:
Create cross-account access with an IAM role in the production account. Grant the appropriate permissions to this role. Allow users in the developer account to assume this role to access the production resources.