modified the readme.md

Author: rdnasim

README.md

@@ -14,6 +14,9 @@
 
 This is a [Flutter package](https://pub.dartlang.org/packages/flutter_bkash) for [bKash](https://www.bkash.com/) BD Payment Gateway. This package can be used in flutter project. We created this package while working for a project and thought to release for all so that it helps.
 
+> :warning: Please note that, you have to contact with bKash sales team for any kind of dev or production access keys or tokens. We don't provide any test account or access keys or don't contact us for such
+
+Check the package in <a target="_blank" href="https://github.com/codeboxrcodehub/flutter-bkash" rel="noopener">github</a> and also available in <a href="https://pub.dartlang.org/packages/flutter_bkash" rel="noopener nofollow" target="_blank">flutter/dart package</a>
 ## How to use:
 
 Depend on it, Run this command With Flutter: