Looking For a Small tid bit of help

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Hey there guys. I have a friend who asked me to handle his config file for a dayz server he has that runs epoch and he asked if I could make it so that when a player disconnects or connects, the server will announce it. I found the area for the code and looked what I thought the code was but after saving the new config I dont seem to be getting it right. Can anyone here tell me whats wrong with the code? I'll post the two codes of line below if you could tell me whats wrong with it I would greatly appreciate it.

onUserConnected = "user id";

onUserDisconnected = "user id";

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You restarted the server?

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yes, server has been restarted but it seems to not accept the coding unless i missed it somewhere