Needing implementations of Friends / Friend Requesting Functionality

Testing for the user.model are unable to work due to the time constraints limiting the progress completed on Sound Circle's friend and friend request system. Files are located in: (SoundCircle/backend/src/Models/Users/__tests__)

## Testing files that lack Friend functionality:
* addUserFriends.tests.ts
* findFriendRecommendations.test.ts
* getUserFriends.test.ts
* removeUserFriend.test.ts