If you are asking about logging in after a startup or restart, you can set up your computer to automaticially login by going to System Preferences/Users and groups. Open the lock, select the account you want to automatically login, and select login options. At the top is automatic log. Select the account from the scroll menu and your computer should login automatically.
Anyone who starts your computer will have access to that account.
I hope I answered the question you were asking.
No clue about ScopedBookmarkAgent.