@Boater170
IF you migrated your Nest Account to a Google Account, then if you go to the Google Nest app, you normally should see a "Sign in with Google" option.
Have you by any chance accessed the home.nest.com website on your computer, and if so, is your account and password saved there in your browser? If you DID migrate and accessed the home.google.com website, do you have a saved password for that site?
If you don't know whether or not you've migrated, and do not know either your original Nest Account or the Google Account to which you migrated, Google Nest Support probably cannot do much, but you could try contacting them:
1. Go to https://support.google.com/googlenest/gethelp.
2. Select a category/product family, and type in a brief description of the issue, then click "Next".
3. Click "Other", then click "Next step".
4. Under "Resources", just click "Next step". (Clicking one of the listed links will bring up a Help page page.)
5. Under "Contact options", choose to get a phone call or chat with the team, depending on availability in your country.
