Google Nest

Can anyone point me in the right direction. I am having problems installing google nest into my home assistant. Presently I am close to giving up completly.
I have installed and deleted everything about 6 times with no luck.

I followed mostlychris’s video to the letter and yet i get an error message saying cannot connect .

Very important…

  1. Settings
  2. Devices and Services
  3. Top Right 3 dots
  4. Application Credentials
  5. Delete the Google Nest credentials
  6. Start installation again