better return system

aura.py

@@ -29,7 +29,10 @@ class Aura:
         self.r = redis.Redis(host=redis_host[0], port=int(redis_host[1]), username=REDIS_USER, password=REDIS_PSW, decode_responses=True)
     
     def get(self, user_id) -> User | None:
-        return User(int(self.r.get(user_id)))
+        try:
+            return User(user_id, int(self.r.get(str(user_id))))
+        except:
+            return None
     
     def add(self, user_id) -> User:
         u = User(user_id, 100)

invite_sys.py

@@ -3,16 +3,15 @@ from config import *
 from flask import Flask, redirect
 from os import environ
 
-aura = Aura('aura.json')
+aura = Aura()
 app = Flask(__name__)
 
 @app.route('/<id>')
 def root(id):
-    aura.load()
     user = aura.get(str(id))
     if user:
         user.balance+=120
-        aura.save()
+        aura.update(user)
     return redirect(INVITE, code=302)
 
 app.run('127.0.0.1', INVITE_SERVER_PORT)