Loads the current OneAuth session into the connection.
If a valid session token exists in the Plug session, it is verified and
assigned to conn.assigns.one_auth.
Invalid or missing sessions result in conn.assigns.one_auth being nil.
Loads the current OneAuth session into the connection.
If a valid session token exists in the Plug session, it is verified and
assigned to conn.assigns.one_auth.
Invalid or missing sessions result in conn.assigns.one_auth being nil.