User repository (#3795)

* It builds with the new user repository

* fix(test): fix broken test

* fix(api): fix registration endpoint that was broken after the change

* fix(test): update test to reflect new user repository

* fix: use interface type instead of concrete type

* fix: restore commented out code

core/chat/events/connectedClientInfo.go

@@ -1,9 +1,9 @@
 package events
 
-import "github.com/owncast/owncast/core/user"
+import "github.com/owncast/owncast/models"
 
 // ConnectedClientInfo represents the information about a connected client.
 type ConnectedClientInfo struct {
-	User *user.User `json:"user"`
+	User *models.User `json:"user"`
 	Event
 }