save project

my_app.py

 import tkinter
-
+from tkinter import messagebox
+import json
+wint open("user.txt","r",encoding="utf-8")
+    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
-    app_reg = My_register
+    app_reg = My_register()
     app_reg.show()
 
 def reg_to_login():   # 注册界面转登录界面
-    pass
+    app_reg.root.destroy()
+    global app_login
+    app_login = My_login()
+    app_login.show()
 
 def register():     # 注册验证
-    pass
+    name,password1,password2 = app_reg.get_input()
+    if name == ""or password2=="":
+        messagebox.showwarning("警告"，"请填写完完整的注册资料")
+    elif name in users:
+        messagebox.showwarning("错误","用户名已存在!")
+    elif password1 != password2:
+        messagebox.showwarning("错误","两次密码不一致")
+    elif:
+        users[name] = password1 
+        content = json.dumps(users)
+        with open("user.txt","w",encoding="utf-8")as file:
+            file.write(content)
+        messagebox.showwarning("成功","注册成功")
+        reg_to_login()
 
 def login():    # 登录验证
-    pass    
+    name,password = app_login.get_input()  
+    pwd = users.get(name)  
+    if pwd == password:
+        messagebox.showinfo("成功","登录成功！")
+    else:
+        messagebox.showinfo("错误","用户密码错误！")
 
 class My_login():       # 登录窗口
     def __init__(self):