Yoda Response: If vulnerabilities were exposed during testing of the secure authentication system, I would take the following steps to address and resolve these issues:

1. **Immediate Assessment:**
   - Conduct a thorough assessment to understand the nature and extent of the vulnerabilities. Identify whether they are related to authentication logic, data transmission, storage, or other areas.

2. **Patch and Fix:**
   - Prioritize the vulnerabilities based on their severity and potential impact. For critical issues, apply immediate patches to mitigate the risk.
   - Review and update the authentication logic to ensure it adheres to best practices and security standards.

3. **Code Review and Refactoring:**
   - Conduct a detailed code review to identify any insecure coding practices that may have led to the vulnerabilities. Refactor the code to enhance security.
   - Involve security experts or conduct a peer review to ensure that all potential vulnerabilities are identified and addressed.

4. **Enhanced Testing:**
   - Implement additional automated and manual security testing to ensure that the fixes are effective and that no new vulnerabilities have been introduced. Use tools like OWASP ZAP or Burp Suite for penetration testing.
   - Perform regression testing to ensure that the changes do not affect the existing functionality of the application.

5. **Update Security Measures:**
   - Strengthen security measures such as input validation, encryption, and secure communication protocols. Ensure that multi-factor authentication (MFA) is correctly implemented and functioning as intended.
   - Update dependencies and libraries to the latest versions to benefit from security patches and improvements.

6. **Documentation and Training:**
   - Document the vulnerabilities, the steps taken to address them, and any changes made to the codebase. This helps in maintaining a record for future reference and audits.
   - Provide training to the development team on secure coding practices and how to avoid similar issues in the future.

7. **Continuous Monitoring:**
   - Set up continuous monitoring and regular security audits to proactively identify and address any new vulnerabilities that may arise.

By following these steps, I would ensure that the vulnerabilities are effectively addressed and that the authentication system is secure and robust.