def regenerate
      store.delete_session(self.session_id)
      self.session_id = Merb::SessionMixin.rand_uuid
      store.store_session(self.session_id, self)
    end
def regenerate
      store.delete_session(self.session_id)
      self.session_id = Merb::SessionMixin.rand_uuid
      store.store_session(self.session_id, self)
    end
Regenerate the session ID.

 :api: private