If I understand correctly, you want to make a script which only works when you're the user who signed in.
Well, you could make the OnEvent_SignIn to check the e-mail address of the user who signed in, like so:
code:
function OnEvent_SignIn(Email) {
if(Email == "someone@hotmail.com") {
StartScript(); //Some function which should start the script, just to give you an example.
}
}
And then, you should do something similar with OnEvent_SignOut, so that it stops before anyone else signs in.