Why do I have to continue to log back after periods(short) of inactivity

It sure does seem like I am constantly having to resupply my TeslaFi login credentials quite often. Sometimes it is required in a few short hours and sometimes longer. I wish this were controllable by a user setting. All of my devices that are used to access require unlock codes so security isn't an issue for me. Perhaps I am missing something that I didn't setup either. Ideas/comments are appreciated.