Supporting Expiring OAuth Access Tokens for GitLab

GitLab introduced a new feature in its OAuth integration, allowing access tokens to expire after two hours to enhance security, thereby deprecating non-expiring tokens from May 2022. This change necessitates implementing token rotation strategies for GitLab integrations, requiring applications to handle expiring OAuth access tokens by generating new tokens using refresh tokens and storing them securely, preferably in Redis for efficiency. The guide explains how to manage token expiration by caching access tokens and refresh tokens securely to prevent unauthorized access and minimize security risks associated with token leaks. By implementing a lock mechanism to control concurrent token refresh requests, the approach ensures efficient token management and supports similar strategies for other OAuth providers, emphasizing the importance of consulting provider-specific documentation for variations in token management practices.