@type t() :: %HookSniffAPI.Model.SubscriptionResponse{
  endpoint_limit: integer() | nil,
  monthly_price_cents: integer() | nil,
  payment_provider: String.t() | nil,
  plan: String.t() | nil,
  retention_days: integer() | nil,
  status: String.t() | nil,
  webhook_limit: integer() | nil
}