Fixes - 2,3,4 security vulnerabilities reported in this message.
https://calendso.slack.com/archives/C03127U5S5Q/p1671922033089329
More Fixes
- Dont't allow a user to add a random attendee to a booking not owned by
him
- Don't allow a user to add a random cal user as an organizer of the
booking.
- Membership deletion should be as per the Privileges of
Owner,Admin,Member
authMiddleware should not use defaultResponder directly as it will catch thrown error and we need those errors to prevent running the rest of the code.