factory reset - Resetting Nexus 6 requires previous account

• Same wifi


• previous person registered on the phone left


• I reset the phone


• after language selection (and wifi selection), I get the problem

Device says

This device was reset. To continue, sign in with a Google Account that was previously synced on this device.

Does anyone know how I might fix this problem? It's an important test phone for me.

Again it’s the same wifi as previously.

I looked How to bypass "Verify your account" (Factory Reset Protection) but Nexus 6 does not have such a home button.