CHANGE: user login style

Backend/endpoints/user.go

@@ -21,18 +21,18 @@ func CreateSessionManager(lifetime time.Duration) *scs.SessionManager {
 
 func LoginHandler(w http.ResponseWriter, r *http.Request){
 	switch r.Method{
-		case http.MethodGet: showForm(w, r)
+		case http.MethodGet: showForm(w, r, false)
 		break
 		case http.MethodPost: loginUser(w, r)
 		break
 		default:
-		showForm(w, r)
+		showForm(w, r, false)
 		break
 	}
 }
 
-func showForm(w http.ResponseWriter, r *http.Request){
-	templates.LoginForm().Render(r.Context(), w)
+func showForm(w http.ResponseWriter, r *http.Request, failed bool){
+	templates.LoginForm(failed).Render(r.Context(), w)
 }
 
 func loginUser(w http.ResponseWriter, r *http.Request){
@@ -66,7 +66,9 @@ func loginUser(w http.ResponseWriter, r *http.Request){
 		log.Printf("New succesfull user login from %s %s!\n", user.Vorname, user.Name)
 		Session.Put(r.Context(), "user", user.PersonalNummer)
 		http.Redirect(w, r, "/time", http.StatusSeeOther) //with this browser always uses GET
+	}else{
+		showForm(w, r, true)
 	}
 
-showForm(w, r)
+showForm(w, r, false)
 }