implement and add tests for POST /follow controller
implement and add tests for POST /listen controller
fix music model test to only delete the music objects that it creates
Merge branch 'feature/controllers'
Merge branch 'feature/music-recommendation-engine'
Fix comment in listen routes
Add status to error returned
Implement and add tests for music recommendation controller
Merge branch 'feature/music-recommendation-engine'
modify user schema by making genre name for music genres listened to be the _id
added new script test and it currently loads the lists of followees and songs listened
Added test to print the recommended music list for user 'a'
Merge branch 'feature/music-recommendation-engine'
Merge branch 'feature/test-script'
Add comment to test script
Add answer to QnA questions