cannot logout properly without provider information

Nobody has claimed this yet.

Hello,

Goth stores its session information on session store with provider name, like `gplus_gothic_session` and logout function `gothic.Logout()` searches and uses the provider name for clearing the session.

So, the App using Goth must remember the provider used by current login per sessions (store in session or similar method), even though I do not care where they coming from.

I wonder why it uses the session name with provider name. If it was just `_gothic_session`, it is more simple to handle on the App. Is there any reason to use `provider_gothic_session`?

Start at gothic.Logout() and trace how the provider-specific session name, such as `gplus_gothic_session`, is selected and cleared. Compare that behavior with the login session flow; done means the issue's provider-information requirement or a simpler session naming approach is resolved without breaking logout.

Written by the indexing model from the issue text.