Collect a signature.

21	delivered, err := product.Actions.SendSignatureRequest(product.ActionSendSignatureRequestInput{}, target)22	if err != nil {23		return nil, err24	}25	deliveryID, err := acknowledgedDeliveryID(delivered)26	if err != nil {27		return nil, err28	}29	if _, err := product.Actions.ConfirmSignatureDelivery(product.ActionConfirmSignatureDeliveryInput{DeliveryID: deliveryID}, target); err != nil {30		return nil, err31	}32	check, err := product.Functions.SignatureRequestTerminalCheck(product.FunctionSignatureRequestTerminalInput{RequestID: requestID})33	if err != nil {34		return nil, err35	}36	firstWait, err := product.Signals.OnboardingSignatureChanged(target, waitCeilingMS, module.SignalOptions{DeadlineAt: input.ReminderAt, Until: check})37	if err != nil {38		return nil, err39	}40	state, err := signatureState(requestID, firstWait)41	if err != nil {42		return nil, err43	}44	if outcome, done, err := finishTerminal(requestID, state, target); done || err != nil {45		return outcome, err46	}47	if _, err := product.Actions.SendSignatureReminder(product.ActionSendSignatureReminderInput{}, target); err != nil {48		return nil, err49	}