I want to reverse engineer what most mobile multiplayer games do with there login system and with that I mean the user is able to start to play immediately with a guest account and can later fill in a name and link with Google, Facebook or email/password. I think I need the following steps the moment the user presses "play immediately".
Create a unique user name, something like guestXXXX and a password.
Store Username and password locally. Encrypt password locally.
Store the username and password in the database. Encrypt password with a unique salt.
Now when the player boots up the game again he will skip the login step since there are local credentials. The only problem I see here is when the user does not register an email, his own password or links with a social media account he will lose his account once he loses his local credentials, most likely with an uninstall. But I think it's very good to have the user play first before he commits with yet another username and password or link with Facebook. I can always throw in a warning when an account is not linked every now and then and give a small bonus when the user links it.
Am I forgetting something here? Are there other proven methods so the player can get engaged immediately?
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