On .env.local file you have to write
//All "" will have to remove
REACT_APP_FIREBASE_API_KEY=
REACT_APP_FIREBASE_AUTH_DOMAIN=
REACT_APP_FIREBASE_PROJECT_ID=
REACT_APP_FIREBASE_STORAGE_BUCKET=
REACT_APP_FIREBASE_MESSAGING_SENDER_ID=
REACT_APP_FIREBASE_APP_ID=const firebaseConfig = {
apiKey: process.env.REACT_APP_FIREBASE_API_KEY,
authDomain: process.env.REACT_APP_FIREBASE_AUTH_DOMAIN,
projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
messagingSenderId: process.env.REACT_APP_FIREBASE_MESSAGING_SENDER_ID,
appId: process.env.REACT_APP_FIREBASE_APP_ID,
};
Then import it otherwise it will not work
$ cd project_directory
$ cd functions
$ firebase functions:config:set api_key1="YOUR_API_KEY1" api_key2="YOUR_API_KEY2"
// Accessing the Keys in Code
const functions = require('firebase-functions');
const api_key1 = functions.config().api_key1;
const api_key2 = functions.config().api_key2;const functions = require('firebase-functions');const request = require('request-promise');exports.userCreated = functions.database.ref('/users/{id}').onWrite(event => { let email = event.data.child('email').val(); return request({ url: 'https://someservice.com/api/some/call', headers: { 'X-Client-ID': functions.config().someservice.id, 'Authorization': `Bearer ${functions.config().someservice.key}` }, body: {email: email} });});