Allow to set rember_me flag, so that cookie with longer lifetime is used

Created by: neumantm

The cookie flask_login creates only lives until the end of the session. But a flag can be given, so the cookie has a longer lifetime. See https://flask-login.readthedocs.io/en/latest/#remember-me.

The transport tool should have a way to use this flag. E.g. with a url parameter in the token url.