Use userId in player, other fixes (#3182)

* [bugfix] player: use userId, other fixes

This PR primarily resolves #1928 by switching the foreign key of `player` from `user.user_name` to `user.id`.
There are also a few other fixes/changes:

- For some bizarre reason, `ip_address` is never returned from `read`/`get`. Change the field to `ip`, which works. Somehow
- Update `players_test.go` mock to also check for user agent, replicating the actual code
- Update `player_repository.go` `isPermitted` to check user id. I don't know how this worked before...
- tests!
- a few places referred to `typ`, when it is really `userAgent`. Change the field names

* baseRequest -> selectPlayer

* remove comment

* update migration, make all of persistence foreign key enabled

* maybe don't forget to save the file first

persistence/persistence_test.go

@@ -26,7 +26,7 @@ var _ = Describe("SQLStore", func() {
 			It("commits changes to the DB", func() {
 				err := ds.WithTx(func(tx model.DataStore) error {
 					pl := tx.Player(ctx)
-					err := pl.Put(&model.Player{ID: "666", UserName: "userid"})
+					err := pl.Put(&model.Player{ID: "666", UserId: "userid"})
 					Expect(err).ToNot(HaveOccurred())
 
 					pr := tx.Property(ctx)
@@ -35,7 +35,7 @@ var _ = Describe("SQLStore", func() {
 					return nil
 				})
 				Expect(err).ToNot(HaveOccurred())
-				Expect(ds.Player(ctx).Get("666")).To(Equal(&model.Player{ID: "666", UserName: "userid"}))
+				Expect(ds.Player(ctx).Get("666")).To(Equal(&model.Player{ID: "666", UserId: "userid", Username: "userid"}))
 				Expect(ds.Property(ctx).Get("777")).To(Equal("value"))
 			})
 		})