chore(auth): add service structs and test error handling

handler/default.go

@@ -13,13 +13,18 @@ import (
 func GetHandler(db *sql.DB) http.Handler {
 	router := http.NewServeMux()
 
-	router.HandleFunc("/$", handleIndex(db))
+	router.HandleFunc("/{$}", handleIndex(db))
 	router.HandleFunc("/", handleNotFound(db))
 
 	router.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./static/"))))
 
-	router.Handle("/auth/", authUi(db))
-	router.Handle("/api/auth/", authApi(db))
+	authHandler := AuthHandler{
+		db:      db,
+		service: service.NewAuthService(db),
+	}
+
+	router.Handle("/auth/", authHandler.authUi())
+	router.Handle("/api/auth/", authHandler.authApi())
 
 	router.Handle("/workout", authMiddleware(db, workoutUi(db)))
 	router.Handle("/api/workout", authMiddleware(db, workoutApi(db)))