Single Click Registration

[suffisme]

Suppose the request contains a body with following data

• unique ID of the user
• unique ID of the event
• Any optional field - queries regarding the event

You are supposed to make a view / function in backend for enabling the single click registration.
Means enrolling the student in that event.

Hint:
Have an events_enrolled field in user model that is array that appends the eventID everytime it is registered.
Have an users enrolled field in event which is again an array of objects that can add the user detail, their queries (if any) to it.

This function should not allow multiple registration of same person in same event.