We must use the database to store a user's friends (this will involve creating an issue just to add friends document to our firestore), then storing the emails of the friend's of a user. Then, we can proceed with notifying the user of someone adding them as a friend and adding them back.
[x] When the users enter emails of their friends, first check if the emails the user entered already exists in the data base.
We must use the database to store a user's friends (this will involve creating an issue just to add friends document to our firestore), then storing the emails of the friend's of a user. Then, we can proceed with notifying the user of someone adding them as a friend and adding them back.