@type t() :: %DocuSign.Model.NewAccountSummary{
  accountId: String.t() | nil,
  accountIdGuid: String.t() | nil,
  accountName: String.t() | nil,
  apiPassword: String.t() | nil,
  baseUrl: String.t() | nil,
  billingPlanPreview: DocuSign.Model.BillingPlanPreview.t() | nil,
  userId: String.t() | nil
}