Cannot read property 'secret' of undefined about angular-firebase-stripe HOT 3 OPEN

$ firebase serve

=== Serving from '/Users/Mitt/Dev/fireship/stripe'...

✔  functions: Using node@8 from host.
i  hosting: Serving hosting files from: public
✔  hosting: Local server: http://localhost:5000
✔  functions: Emulator started at http://localhost:5001
i  functions: Watching "/Users/Mitt/Dev/fireship/stripe/functions" for Cloud Functions...
⚠  TypeError: Cannot read property 'secret' of undefined
    at Object.<anonymous> (/Users/Mitt/Dev/fireship/stripe/functions/lib/config.js:12:49)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/Mitt/Dev/fireship/stripe/functions/lib/sources.js:13:18)
    at Module._compile (module.js:653:30)
⚠  We were unable to load your functions code. (see above)
   - It appears your code is written in Typescript, which must be compiled before emulation.
   - You may be able to run "npm run build" in your functions directory to resolve this.

"stripe": {
    "publishable": "foo",
    "secret": "bar",
    "clientid": "baz"
}