Block completing event if not all awards have been assigned #2036
Description
Describe the bug
Currently the complete event buttonn sets the flag in the DB without any validation. We should add validation where we check first if all awards have been assigned (have either a winner name or winner id) and respond with an error code if not.
(Show toast on error, not on success)
To Reproduce
Steps to reproduce the behavior:
- Go to admin event settings page
- Click on complete event
Expected behavior
Proper validation and erroring in place