Hi. I've tested the scriptcall with the script command and with the control variable command. I can't reproduce the issue of showing two notifications. If you have further information about the problem, please let me know. Please test it in a new project. If there is no issue, there may be a problem between several plugins.
I will add a plugin command argument to get the id out from a variable.
If you want to check that a user is logged in you have to call the plugin command "GameJolt acitve user" or the scriptcall "GameJolt.getActiveUser();" and afterwards you have to put "$gameTemp.GJactiveUser" into the script area of a conditional branch. I will add a function to make this easier to the next version.
