Accepts the invitation to be monitored by a master GuardDuty account.
guardduty_accept_invitation(DetectorId, InvitationId, MasterId)
[required] The unique ID of the detector of the GuardDuty member account.
[required] This value is used to validate the master account to the member account.
[required] The account ID of the master GuardDuty account whose invitation you're accepting.
svc$accept_invitation( DetectorId = "string", InvitationId = "string", MasterId = "string" )