@_helpers.positional(<NUM_LIT:2>)<EOL><INDENT>def __init__(self, scope, **kwargs):<DEDENT>
self.scope = _helpers.scopes_to_string(scope)<EOL>self._kwargs = kwargs<EOL>self.service_account_id = kwargs.get('<STR_LIT>', None)<EOL>self._service_account_email = None<EOL>super(AppAssertionCredentials, self).__init__(None)<EOL>
Constructor for AppAssertionCredentials

        Args:
            scope: string or iterable of strings, scope(s) of the credentials
                   being requested.
            **kwargs: optional keyword args, including:
            service_account_id: service account id of the application. If None
                                or unspecified, the default service account for
                                the app is used.