* BE sentry setup w/ user scope
* FE sentry integration + user scope
* FE env adjustments
* FE: use NODE_ENV for Sentry
* BE: use FLASK_ENV for Sentry
* BE: remove email, acct & ip from Sentry user scope
* comment .env.example SENTRY* for CI
* fix merge artifact
* Signup requires valid EIP-712 signature. Refactor some auth reducer nomenclature for consistency.
* Add auth endpoint for logging in that checks for valid signature, like create user.
* Fix tests, move dummy data into test_data.py.
* No strict slashes.
* example auth service
* prep for merge
* MVP signed transaction based auth
* update auth service endpoint and delete checked-in auth service
* add readme explanation for AUTH_URL
* rename eip-712 headers
* fix test errors