@type t() :: %Nombaone.ConflictError{
  __exception__: true,
  code: Nombaone.Error.code() | nil,
  doc_url: String.t() | nil,
  fields: %{optional(String.t()) => [String.t()]} | nil,
  hint: String.t() | nil,
  message: String.t() | nil,
  request_id: String.t() | nil,
  status: non_neg_integer() | nil
}