How to catch exception invalid user exception in version 24.4 ?

Certified Associate Developer

in version 24.4 isuseractive function is not available, is there any other way to achieve this? I just want to validate if user is acitve or deactivated or even if doesn't exist anymore in the system, we are trying to validate the scenario if for any reason the user saved in DB was deactived or deleted from the system, cause currently we are saving the result of calling the funcion loggedInUser() in DB, this is storing a text value, however we have the requirement to display the fisrtName and lastName of the user in the frontend, but if the user doesn't exist in the DB we are getting  invalid user exception at the moment to use user(username,property) function, since we don't have a try-catch similiar function in version 24.4, I would like to know if there is any other way to catch the exception or change the approach following your recomendations. Any help will be greatly appreciated, thanks and regards!

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