docs: def init(cloud_url):
      """
      Choose a cloud server to use. Sets CLOUD_URL as the cloud server to use and
      sets up replication of global databases from that cloud server if a local
      database is already initialized (via `openag db init`).
      """
      old_cloud_url = config["cloud_server"]["url"]
      if old_cloud_url and old_cloud_url != cloud_url:
          raise click.ClickException(
              'Server "{}" already selected. Call `openag cloud deinit` to '
              'detach from that server before selecting a new one'.format(
                  old_cloud_url
              )
          )
      parsed_url = urlparse(cloud_url)
      if not parsed_url.scheme or not parsed_url.netloc or not parsed_url.port:
          raise click.BadParameter("Invalid url")
      if config["local_server"]["url"]:
          utils.replicate_global_dbs(cloud_url=cloud_url)
      config["cloud_server"]["url"] = cloud_url