Listener for a person in a certain grouping

I am trying to make a plugin so that when a player in a certain group logs in it creats a note in a txt file that lists the date and time that they logged in. Then when they log out, I would like this also updated. I am working on writing the new line but I dont know what the listener should be.

 

You can't have the trigger only for these groups - but you can get all login/logout events and check whether to deal with it there. The listener is nothing special, just find out if the player is in that group - inside of a normal handler.

 

they are grouped using the permisons plugin

 

In your PlayerListener.onLogin or PlayerListener.onJoin method you will check the player to see if they're in the desired group and then perform your own logic. You will repeat this for the PlayerListener.onQuit method. I'm not certain if I answered your question.