added proper types to structs, return empty arrays instead of null

router/router.go

@@ -21,7 +21,7 @@ func SetupRoutes(app *fiber.App) {
 	auth.Get("/validate", middleware.Protected(), handlers.ValidateToken)
 
 	// Contacts group
-	contacts := chat.Group("/contact", middleware.Protected(), logger.New())
+	contacts := chat.Group("/contacts", middleware.Protected(), logger.New())
 	contacts.Delete("/:contactID/:conversation_id", handlers.DeleteContact)
 	contacts.Post("/:contactUsername", handlers.InsertContact)
 	contacts.Get("/", handlers.GetContacts)