start server node app.js #####goto browser to see the barcode to scan http://localhost:3000/totp/process

#####use the postman collection 2fa.postman_collection.json to... ...get a secret with /totp/secret
...validate the generated code with /totp/validate

#####to scan the code use eighter... ...Google Authenticator Android --> https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=de_CH
iOS --> https://apps.apple.com/ch/app/google-authenticator/id388497605

...Authy Android --> https://play.google.com/store/apps/details?id=com.authy.authy&hl=de
iOS --> https://apps.apple.com/de/app/authy/id494168017

(btw: Authy is way better...)