.ENV File
Make sure to add the .env file in the below format
NOTE
Also, add the following contents in the line 111, 112 More details here.
// node_modules\react-native-oauth\android\src\main\java\io\fullstack\oauth\OAuthManagerDialogFragment.java
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.getSettings().setUserAgentString("Mozilla/5.0 (Linux; Android 4.1.1; Galaxy Nexus Build/JRO03C) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19");