details array with one entry
per failing field, for example:
invalid_request
HTTP 400 — the request body or query failed validation.
The request was well-formed HTTP but its content did not pass validation:
a required field is missing, a value has the wrong type or format (for
example a phone number that is not E.164), or a query parameter is invalid.
When validation fails, the response includes a
Not retryable. Correct the request and send it again.
All error codes and the retry model: Errors.