def METHOD_NAME(fid, body):
    """
    Append rows to a grid.
    :param (str) fid: The `{username}:{idlocal}` identifier. E.g. `foo:88`.
    :param (dict) body: A mapping of body param names to values.
    :returns: (requests.Response) Returns response directly from requests.
    """
    url = build_url(RESOURCE, id=fid, route="row")
    return request("post", url, json=body)