def build_identity(self, state_data):
raise NotImplementedError<EOL>
Return a mapping containing the identity information.

        The resulting data captured by the pipeline

            >>> {
            >>>     "id":     "foo@example.com",
            >>>     "email":  "foo@example.com",
            >>>     "name":   "Foo Bar",
            >>>     "scopes": ['emaill', ...],
            >>>     "data":   { ... },
            >>> }


        Raises:
             InvalidIdentity