save project

my_app.py

 import tkinter
 from tkinter import messagebox
-with open("user.txt","")
+with open("user.txt","r",encoding="utf-8")as f:
+    info = f.read()
+    users = json.loads(info)
 def login_to_reg():    # 登录界面转注册界面
     app_login.root.destroy()
     global app_reg