Environment Variable Environment Variable There is a file called ".env" in the project files that holds all the environment variables used in the app. .env_13// FOR FIREBASE AUTHENTICATION_13REACT_APP_FIREBASE_APT_KEY =_13REACT_APP_FIREBASE_AUTH_DOMAIN =_13REACT_APP_FIREBASE_DATABASE_URL =_13REACT_APP_FIREBASE_PROJECT_ID =_13REACT_APP_FIREBASE_STORAGE_BUCKET =_13REACT_APP_FIREBASE_MESSAGING_SENDER_ID =_13REACT_APP_FIREBASE_APP_ID =_13REACT_APP_FIREBASE_MEASUREMENT_ID =_13_13// FOR AUTH0 AUTHENTICATION_13REACT_APP_AUTH0_CLIENT_ID =_13REACT_APP_AUTH0_DOMAIN = Reference https://create-react-app.dev/docs/adding-custom-environment-variables (opens in a new tab) Folder StructureSidebar Navigation