* MM-21481: Fixed several issues from user marshalling
- Fixed the root cause for panic by properly converting
the map to a User struct.
- Added a check for type conversion for extra safety.
- Fixed a somewhat unrelated issue of a pointer to pointer reference.
* Fix tests
* Make WebSocketEvent type immutable
* Update code to use updated immutable WebSocketEvent type
* Export WebSocketEvent fields and mark them as deprecated
* Consistent license message for all the go files
* Fixing the last set of unconsistencies with the license headers
* Addressing PR review comments
* Fixing busy.go and busy_test.go license header
