Improving Account Confirmation for a Hassle-free Experience

I'm interested in finding a more convenient method for confirming my account, without the concern of the "invitation token provided is no longer valid" error. Could the confirmation email not have a time constraint or possibly be extended beyond 20 minutes? If we must utilize a token, could it remain valid for a span of 2 or 3 days? The current process entails a laborious cycle of communication to ensure the host can click the confirmation button within a limited 20-minute window before it expires. In the event that it does, I'm then required to resend the confirmation email and hope they're available at their desk.