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Expose field_warnings / field_errors arrays for Lists.BatchAsync()

See original GitHub issue

The following call is failing for me. memberBatchList is a combination of new and existing subscribers to the list.

BatchList memberBatchList = new BatchList {
    Members = subscribers,
    UpdateExisting = false 
};

BatchListResponse resp = _mailChimp.Lists.BatchAsync(memberBatchList, this.mailChimpListId).Result;

resp.Errors contains an ErrorResponse for each provided Member. The Error property is “The resource submitted could not be validated. For field-specific details, see the ‘errors’ array.”

I’ve seen this before with different libraries, usually it’s a required merge field that is not present. Mailchimp passes these back via the field_errors array.

The docs say:

"InvalidResource The resource submitted could not be validated.

For field-specific details, see field_warnings or field_errors objects. This error means that the object submitted to a POST or PATCH request failed to validate against JSON schema, and could relate to campaign, interest group, merge field, or any other available object."

Is it possible to expose these via this library?