OK figured it out after digging around in google.
Two new extended privilege sets; fmreauthenticate0, and fmreauthenticate10. The number after the extended privilege name is how long, in minutes, the user has to re-access the database before having to re-authenticate. 0 means they have to re-authenticate every time, 10 means in 10 miuntes.
Filemaker GO app needs a way of saving your user name and password within the app and not on the database side so you never have to type your user name or password ever again. A ton of apps have this function.
You can set the fmreauthenticate10 to a number up 10080. fmreauthenticate[X]