Turn on auto logon in a sysprepped Vagrant box

Vagrantfile

Vagrant.configure("2") do |config|
  config.vm.define "tst" do |cfg|
    cfg.vm.box = "StefanScherer/windows_2016"
    cfg.vm.hostname = "tst"

    cfg.vm.provider "virtualbox" do |vb|
      vb.gui = true
      vb.memory = "2048"
      vb.linked_clone = true
    end
  
    cfg.vm.provision "shell", privileged: false, inline: <<-SHELL
      Set-ItemProperty "HKLM:\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon" -Name AutoAdminLogon -Value 1
      Set-ItemProperty "HKLM:\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon" -Name DefaultUserName -Value "vagrant"
      Set-ItemProperty "HKLM:\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon" -Name DefaultPassword -Value "vagrant"
      Remove-ItemProperty "HKLM:\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon" -Name AutoAdminLogonCount -Confirm -ErrorAction SilentlyContinue
    SHELL
    cfg.vm.provision "reload"
    cfg.vm.provision "shell", privileged: false, inline: <<-SHELL
      iwr -useb https://chocolatey.org/install.ps1 | iex
      choco install -y docker
      docker --version
    SHELL
    
  end
end

Actually, after a glass of wine I was able to find the solution. For Hyper-V if you connect via an enhanced session, I guess it requires you to enter the password, but if you connect to the vm via a basic session, you don't need to enter the password. I don't understand by I'm happy to figure it out finally.

chocolatey/boxstarter#318
https://superuser.com/questions/709874/change-server-2012-display-resolution-inside-of-a-hyper-v-vm
Close the session if you have it open. Just 'orange x' it out. No need to shut it down.
When closed, some settings behaviors change. Right click on your VM and under 'Connect', there should now be 'Edit Session Settings'.
This should now bring you back to the dialog that lets you select resolution and attach local devices to the VM.
Once you have a new resolution selected, just re-connect.