You can’t use 127.0.0.1 in your Google settings. This would point back to the server in Google’s data center. If you are running Redash on your local machine then you won’t be able to login with Google without some dubious middleware like ngrok or similar.
The address 127.0.0.1 is translated by computers as localhosthttps://en.wikipedia.org/wiki/Localhost
Hence if you put this in as the redirect address in the OAuth settings in your Google project, you’re telling the Google server to redirect users back to itself, when what you want to it to do it redirect users to the server actually running Redash. Therefore you need to have Redash running on an address (ideally with a DNS name like https://redash.acme.com) that your browser is going to be able to resolve to correctly connect to Redash after authenticating with Google.