Allow setting a name for the session

[jthoward64]

It would be nice to allow setting a friendlier name than the url + the user agent. This could be accomplished by adding an optional query param (for example session-name) and modifying this line to use that instead. I suppose there is a slight security issue if a malicious site were to try and imitate another site though. To remedy that I would suggest just prefixing the custom session name with App Password: or something. I would be willing to make a PR if you would accept it.