The first thing you should do after purchasing BNB is get in our Discord and register your key. BY registering your key you will be able to reset the key and check the expiration. You can also register multiple keys.
Here is the link to join Discord. After joining follow the instructions in #welcome.
It is only 1 Discord registration per key. So if you are sharing your key with other people only 1 of you will be able to gain Discord access.