How to simulate test users?
Guests are people outside your company (free users)
Members are your employee inside your company (paid users)
You can use the '+' trick in gmail addresses to test assignment to guests and members:
Please ensure you click Enter, the Space bar or the comma button after completing the guest email address to list it, the guest email will turn blue once it is listed.
Once a task is assigned to a guest, you can copy the link and then view it: