SavingsPlanTerm type
Represents the Savings plan term in ISO 8601 format.
KnownSavingsPlanTerm can be used interchangeably with SavingsPlanTerm,
this enum contains the known values that the service supports.
Known values supported by the service
P1Y: P1Y
P3Y: P3Y
P5Y: P5Y
type SavingsPlanTerm = string