Hello Developers:
I am making an application in which only 4 users are allowed to login at a time for a company. So I am making a field in a table for storing how many users are login:
for login i'm incrementing the field by 1 and on every logout m decrementing by 1. But when user directly close the window without logout then what should i do to make this application working for logging only 4 users at a time.????
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