Firebase key env var is undefined

Question

Project ID: 2e3ec74d-79cb-4540-9075-b1f15516cbd6

Hi everyone. This is my first time using Railway and first time trying to build a backend server. For some reason my firebase_private_key is coming through as undefined, here is the error from the logs:

file:///app/src/services/firebase.js:12
    private_key: process.env.FIREBASE_PRIVATE_KEY.replace(/\n/g, '
'),
                                                  ^
TypeError: Cannot read properties of undefined (reading 'replace')

Im not sure why its undefined though, I added my variables under the service variables. Any help or guidance would be greatly appreciated 🙏