Scopes for Google Sheets API are https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/spreadsheets https://www.googleapis.com/auth/drive https://www.googleapis.com/auth/drive.file https://www.googleapis.com/auth/drive.resource https://www.googleapis.com/auth/spreadsheets https://spreadsheets.google.com/feeds https://spreadsheets.google.com/feeds/ http://spreadsheets.google.com/feeds http://spreadsheets.google.com/feeds/ https://spreadsheets.google.com/feeds/spreadsheets https://spreadsheets.google.com/feeds/spreadsheets/private/full http://spreadsheets.google.com/feeds/spreadsheets/private/full https://spreadsheets.google.com/feeds/worksheets/ https://spreadsheets.google.com/tq https://spreadsheets.google.com/feeds/list/ https://spreadsheets.google.com/feeds/worksheet/ https://spreadsheets.google.com/feeds/cell/
Amplify Redirect URIs are stored in amplify-meta.json (in amplify > backend) parameters.json (in amplify > backend > auth > APPNAME) aws-exports.js