Developed a security-focused authentication upgrade for the port-labs/ocean ServiceNow integration, introducing OAuth 2.0 Client Credentials with token refresh and automatic expiration handling. Used Python to implement a pluggable authenticator pattern, decoupling authentication logic from the client and supporting both OAuth and Basic strategies. Enhanced backend reliability by adding token caching with an async lock to prevent race conditions and introduced robust credential validation to fail fast when required credentials are missing. Updated configuration files and documentation to reflect OAuth usage, ensuring backward compatibility and laying the foundation for future multi-authentication strategies while improving the integration’s overall security posture.