Get available fields for usage summary

List the field names returned by GET /api/v1/usage/summary at each of its three response levels. Each list contains every key the data endpoint emits—both typed fields declared in the OpenAPI spec and untyped keys exposed through additionalProperties (the latter used for billing dimensions and usage types added after the v1 schema freeze).

This endpoint is only accessible for parent-level organizations.

Go example:

fields, _, err := api.GetUsageSummaryAvailableFields(ctx)
attr := fields.Data.GetAttributes()

// resp is the *UsageSummaryResponse returned by api.GetUsageSummary(ctx, ...)
// Layer 1: UsageSummaryResponse
for _, key := range attr.GetResponseFields() {
    if val, ok := resp.AdditionalProperties[key]; ok {
        fmt.Println(key, val.(json.Number))
    }
}
// Layer 2: UsageSummaryDate (per month)
for _, date := range resp.GetUsage() {
    for _, key := range attr.GetDateFields() {
        if val, ok := date.AdditionalProperties[key]; ok {
            fmt.Println(key, val.(json.Number))
        }
    }
    // Layer 3: UsageSummaryDateOrg (per org per month)
    for _, org := range date.GetOrgs() {
        for _, key := range attr.GetDateOrgFields() {
            if val, ok := org.AdditionalProperties[key]; ok {
                fmt.Println(key, val.(json.Number))
            }
        }
    }
}