API to Sync RDS and Discord members using inDiscord flag

[nashitshayan]

Overview

We want to sync the verified users that are on our discord server with the list of users that are registered in our RDS db. We want to keep track of members who have not yet verified themselves, those who are new, and those that have left our discord server.
We no longer want to keep the record of users in our RDS db that have either left or have been removed from our server. This API will serve as a stepping stone for many features to be developed further.

User Stories

• For now, this API will be used internally by admins to sync the data.
• When the API is called, it should take in the current list of our discord members and sync it with the existing list of verified users in our RDS backend, marking them with a inDiscord boolean property and return the updated list.
• It should give us stats like x users left, y users newly joined.

Acceptance Criteria

• Should correctly sync the data
• Should return the updated list of users in our RDS backend
• Should also return with a number of newly joined and number of user who have left our discord server