This would be a nice option to have. It seems to be random for me though .. sometimes it will ask me to sign in and other times it wont
FSW has a similar problem. However fortunately it also has a Dovetail Live within the game as well, This allows the workaround of permanently skipping the login screen on entry and using the icon within FSW to logon as that one does have a "remember me" box. That said, I'm baffled as to why this seems to be so difficult for DTG to address.