When you sign in, Google tells this app your email address, so BigQuery can check you are on the team. The app asks Google for access to BigQuery so your tools can run your queries there. Backforwards does not store anything else about you, and your Google data is not used for anything else.
The game data itself describes players only by a pseudonymous key: no Roblox user ids, names or anything players typed. A Roblox Right to Erasure request deletes that player's data.
Questions: hey@backforwards.com.