Keeping on trying to fully understand GAE Authentication, with the Expenses
example approach, I find these lines of code:
UserService userService = UserServiceFactory.getUserService();
...
if (!userService.isUserLoggedIn()) {
...
}
And now I get stuck into this.
- What is that UserService? Ok, it´s the interface
com.google.appengine.api.users.UserService.
- But how does it work? How can it check if a user is logged in? where the
hell does it get the users from?
Thank you in advance.
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