save project

my_app.py

 import tkinter
 from tkinter import messagebox
+import json
+
+with open ("user.txt","w",encoding=="utf-8")as f:
+    info=f.read()
+    users=json.loads(info)
 
 def login_to_reg(): 
     app_login.root.destroy()
@@ -20,17 +25,20 @@ def register():     # 注册验证
         messagebox.showwarning("错误","用户已存在")
     elif password1!=password2:
         messagebox.showwarning("错误","密码填写错误")
-    else :
+    else:
         users[name]=password1
         content = json dumps(users)
         with open ("user.txt","w",encoding=="utf-8")as file:
             fire.write(content)
         messagebox.showinfo("成功","注册成功")
         login_show()
-
-
-def login():    # 登录验证
-    pass    
+def login():
+    name,password=app_reg.get_input()
+    pwd=users.get(name)
+    if pwd==password:
+        messagebox.showinfo("成功","登录成功")
+    else:
+        messagebox.showwarning("错误","用户名或密码错误")
 
 class My_login():       # 登录窗口
     def __init__(self):