def login_from_session
      account = Account.find(session[:account_id]) if session[:account_id]
      self.auth_type_used = :session if not account.nil?
      self.current_account = account
    end
def login_from_session
      account = Account.find(session[:account_id]) if session[:account_id]
      self.auth_type_used = :session if not account.nil?
      self.current_account = account
    end
Called from #current_account.  First attempt to login by the account id stored in the session.