API endpoint to get validators set.

        Return:
            A JSON string containing the validator set of the current node.

def get(self):
        """API endpoint to get validators set.

        Return:
            A JSON string containing the validator set of the current node.
        """

        pool = current_app.config['bigchain_pool']

        with pool() as bigchain:
            validators = bigchain.get_validators()

        return validators