def METHOD_NAME(self, key):
    """
    Add the new key to the config and upload the configuration back to the
    O3R.
    :key:bytes: Public key to forward to the O3R.
    """
    config = self.o3r.to_json()
    old_keys = config['device']['network']['authorized_keys']
    new_keys = old_keys + ',' + str(key, encoding='UTF-8')
    config['device']['network']['authorized_keys'] = new_keys
    self.o3r.from_json(config)