return {
    [400] = "bad_request",
    [401] = "unauthorized",
    [403] = "forbidden",
    [404] = "not_found",
    [405] = "method_not_allowed",
    [408] = "request_timeout",
    [409] = "conflict",
    [410] = "gone",
    [411] = "length_required",
    [413] = "payload_too_large",
    [414] = "uri_too_long",
    [415] = "unsupported_media_type",
    [418] = "im_a_teapot",
    [429] = "too_many_requests",
    [500] = "internal_server_error",
    [501] = "not_implemented",
    [502] = "bad_gateway",
    [503] = "service_unavailable",
    [504] = "gateway_timeout",
    [505] = "http_version_not_supported"
}