In a scenario where your team of developers needs to connect application servers securely to various cloud-based services without embedding sensitive credentials in the codebase, which method would be MOST appropriate to facilitate authentication and maintain security best practices?
Include the requisite SSH keys in the codebase itself, making them part of the application's version control to simplify access.
Embed the generation and storage of SSH keys directly in the environment variables, relying on them to establish secure connections.
Upload the SSH keys to a widely readable file storage service to allow anytime access for the development team, aiming to simplify their usage.
Utilize an identity and access management service to create roles tied to the server instances, thereby allowing the automatic provisioning of temporary credentials that facilitate secure communications.