Error in Event Registration due Faulty mutation

[GlenDsza]

Describe the bug
The registerForEvent mutation being used for register functionality was updated in Talawa API in PalisadoesFoundation/talawa-api#1644 . Before update registerForEvent returned Event object, after update it returns EventAttendee object. Due to older implementation of registerForEvent the mutation fails.

To Reproduce
Steps to reproduce the behavior:

1. Login in a organiszation.
2. Open Events Tab
3. Open a specific event (where you've not already registered)
4. Click on register.
5. Error is displayed as No mutation occurs.

Expected behavior
On click of register button, user should be registered for the event.

Actual behavior
On click of register button, error is displayed due to failing mutation.

Screenshots

registerEvent.mp4

Additional details
Part (pre-requisite) for Event Parity project

Potential internship candidates
Please read this if you are planning to apply for a Palisadoes Foundation internship #359

[GlenDsza]

Would like to work on this issue