-- Lose user doubt -- lose the user ID after the session -- Get the friend list of the previously logged-in user, obtaining only a list with friend IDs. -- Obtain the buddy list of the previously logged-in user, getting only a list that includes buddy IDs. -- Go to the list of accounts among the previous user's friends that have already been added (includes only friend IDs). -- Go to the list of accounts among the current user's friends that have already been added (includes basic information of buddies). -- Determine whether two groups of users are mutual friends, the number of users in both compared groups must be equal. -- Add small actions for the current session user. -- Batch send notifications to users specified by the uids parameter, at least 20 friends at a time. -- Verify if an order has been successfully paid on the Facekoo platform.
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