TalonOne::ReferralConstraints Properties Name Type Description Notes start_date DateTime Timestamp at which point the referral code becomes valid. [optional] expiry_date DateTime Expiration date of the referral code. Referral never expires if this is omitted. [optional] usage_limit Integer The number of times a referral code can be used. `0` means no limit but any campaign usage limits will still apply. [optional] Code Sample require 'TalonOne' instance = TalonOne::ReferralConstraints.new(start_date: 2020-11-10T23:00Z, expiry_date: 2021-11-10T23:00Z, usage_limit: 1)