…onse.

Also removed agreeToPhotoRelease in EventSignInRequest for now.

I still don't know what to do if the AppUser's role is an affiliate role
(so inductee, member, officer, anything that is not guest). Might just
treat those roles the same way as how I handle attendance register for
non-affiliates.

Also, how do I do testing for this????

Worked properly for new non-affiliates and recurring
non-affiliates in terms of signing up. Modified Attendance
entity schema a little (made duration column nullable).

Moved the logic of saving non-affiliate AppUser entities to
AppUserService. Changed RegisterAttendance so that it uses
AttendanceRepository's Insert instead of Save to prevent
inserts of duplicate data.

Added RequestToEntityByEmail and AppUserService now doesn't depend on
mappers and payloads anymore.