Env File Firebase
$ 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;
Inquisitive Iguana