Looking for an alternative to tapping Shift for forcing the login screen to show after signing out

I feel like I should know this, and after searching for a bit, I'm coming up with nothing.

Group policy on the PCs forces it to sign in immediately when I sign out. I need to use my specific ID for admin access to do the work I need to do on these PCs, so I have to sign out of the generic account that gets auto logged. My current solution is to tap Shift repeatedly, and doing this over VNC is sometimes... unreliable. Holding down Shift doesn't seem to do it, so I just tap it to some semi-random rhythm, then disable Sticky Keys as soon as I get logged in if someone didn't beat me to it.

Is there another hotkey or key combo that I can do that would be more reliable to force the PC to stop the auto login process after signing out? I'd prefer not to reboot the PCs, since that will bring about more nuisances.