@type t() :: %Polarex.MeterCreate{
  aggregation:
    Polarex.CountAggregation.t()
    | Polarex.PropertyAggregation.t()
    | Polarex.UniqueAggregation.t(),
  custom_label: String.t() | nil,
  custom_multiplier: integer() | nil,
  filter: Polarex.Filter.t(),
  metadata: map() | nil,
  name: String.t(),
  organization_id: String.t() | nil,
  unit: String.t() | nil
}