def txn_storeAssociation(self, server_url, association):
        """Set the association for the server URL.

        Association -> NoneType
        """
        a = association
        self.db_set_assoc(
            server_url,
            a.handle,
            self.blobEncode(a.secret),
            a.issued,
            a.lifetime,
            a.assoc_type)
Set the association for the server URL.

        Association -> NoneType