Security Changes

This update includes changes required to work with Salesforce’s upcoming security requirements which we’d previously deployed to beta. This includes support for PKCE challenges and Refresh Token Rotation. It also improves error handling when using a group-level authorization token.

These changes should be backward-compatible and require no intervention from the user. They are targeted at deployments accessing DayBack from outside of Salesforce, especially those using group level Salesforce authentication.