When sharing a prototype, you have the option of enabling a feature called Require user identification.
This setting does not require the person accessing the share link to have an account—it is simply a way for them to identify themselves to the prototype owner when viewing the link.
If you would like to also limit who can access a prototype, we suggest that you also password protect the share link.
To require user identification:
- Open your prototype and, in the top-right corner, click the Share button.
- In the share modal, click Link Settings, and then click More Options.
- Click to toggle on Require user identification.