Validate and store redirect URIs for client.

def redirect_uris(self, value):
        """Validate and store redirect URIs for client."""
        if isinstance(value, six.text_type):
            value = value.split("\n")

        value = [v.strip() for v in value]

        for v in value:
            validate_redirect_uri(v)

        self._redirect_uris = "\n".join(value) or ""