Not available yet. This page describes the intended behaviour.
Revoking a link
Site settings → Sharing.
Find the link.
Revoke.
It stops working immediately. Anyone holding the URL sees that the dashboard is no longer available rather than a stale copy of your numbers.
There is no delay and no cache to wait out. A viewer with the page already open gets nothing on their next request — a range change, a filter click, or a refresh.
Revoking is permanent
A revoked slug is not reusable. Creating a new link gives you a new URL, so anyone holding the old one is not silently re-admitted.
That is the intended behaviour: the point of revoking is usually that a link reached someone it should not have.
Deactivating instead
If you want to pause a link rather than kill it — a client dashboard between engagements — deactivate it instead. It stops working and can be turned back on with the same URL.
Use revoke when the link has leaked. Use deactivate when you are just done with it for now.
What revoking does not do
It does not tell you who used it. There is no viewer identity recorded — only a count of views. If a link leaked, you can see that it was viewed and not by whom.
It does not delete anything. Your data is untouched; only the public view of it is removed.
It does not affect your other links. Each is independent, so revoking the public one leaves your co-founder's working.
If you think a link has leaked
Revoke it. Immediately, before working out what happened.
Create a new one if the people who should have access still need it, and send it directly.
Consider a password on the replacement, so a second leak is not sufficient on its own.
There is nothing to reset beyond that. A share link carries no access to your account, so a leaked link exposes the dashboard sections you enabled and nothing else.
Turning off sharing entirely
Revoke every link for the site. With none active, the site is not publicly reachable by any URL.
Deleting the site also removes its links, along with everything else. See Deleting your data.