Is there anyway to revoke cert.pem which "cloudflared tunnel login" creats?

I used “cloudflared tunnel login” create cert.pem in a untrustable pc, but found even I revoke all certificates in Cloudflare web dashboard, cert.pem can create new tunnel or delete it. So if I leak my cert.pem, how to keep my account safe? Is there any way to revoke cert.pem. :cry:

It has been 1 year from this issue closed, is there any method now? And because of

Legacy Tunnels are becoming unsupported. You should migrate all existing legacy tunnels to Named Tunnels by October 1, 2022. For more information on this change, refer to our [documentation]

the possible method provided by @TownLake seems not work now. :rofl: