Change store namespace

[marvincaspar]

Feature

It should be possible to change/set the store namespace in the session class.
https://github.com/hybridauth/hybridauth/blob/master/src/Storage/Session.php#L23

If you have multiple logins (user/password or hybridauth) you just want to store the current user in the session with one key, e.g. user or auth. In this case HYBRIDAUTH::STORAGE is not the best name and you should have the option to change it.

Version

v3.0