Wrap application in Auth0Provider and use Auth0 config

src/index.js

@@ -3,8 +3,31 @@ import ReactDOM from 'react-dom';
 import './index.css';
 import App from './App';
 import * as serviceWorker from './serviceWorker';
+import { Auth0Provider } from "./react-auth0-spa";
+import config from "./auth_config.json";
+import history from "./utils/history";
 
-ReactDOM.render(<App />, document.getElementById('root'));
+// A function that routes the user to the right place
+// after login
+const onRedirectCallback = appState => {
+  history.push(
+    appState && appState.targetUrl
+      ? appState.targetUrl
+      : window.location.pathname
+  );
+};
+
+ReactDOM.render(
+  <Auth0Provider
+    domain={config.domain}
+    client_id={config.clientId}
+    redirect_uri={window.location.origin}
+    onRedirectCallback={onRedirectCallback}
+  >
+    <App />
+  </Auth0Provider>,
+  document.getElementById("root")
+);
 
 // If you want your app to work offline and load faster, you can change
 // unregister() to register() below. Note this comes with some pitfalls.