What class is responsible for this function?

Question

PHP

There is a User class responsible for user actions and a Payment class responsible for financial transactions. And now the user has already replenished his balance, the money is in his account and he presses the Upgrade button to upgrade his account to a paid one. Changes will occur in both the users table and the payments table. it will be recorded when and on what the money that lies on the couple was spent.
Which class should perform this Upgrade action: User or Payment and why?

Answer 1

You can make a separate UserAccountManager class:
UserAccountManager::upgrade($user);