Completes requirements of friendships card, except the following:
Edge Case: Make sure this fails gracefully. If you open up a POST route to create a friendship, be sure to catch the scenario where someone sends an invalid user id. Send a flash message alerting them of the error.
Completes requirements of friendships card, except the following:
https://github.com/Mackenzie-Frey/brownfield-of-dreams/issues/12