BrowserStack access credentials URL in readme.

Author: kn-neeraj

README.md

@@ -53,7 +53,7 @@ Ensure that @ symbol is prepended to the file path in the above request. Please
 
 Open `browserstack_sample.rb` file in `android` or `ios` directory :
 
-- Replace `YOUR_USERNAME` & `YOUR_ACCESS_KEY` with your BrowserStack access credentials
+- Replace `YOUR_USERNAME` & `YOUR_ACCESS_KEY` with your BrowserStack access credentials. Get your BrowserStack access credentials from [here](https://www.browserstack.com/accounts/settings)
 
 - Replace `bs://<app-id>` wkth the URL obtained from app upload step
 
@@ -88,7 +88,7 @@ Ensure that @ symbol is prepended to the file path in the above request. Please
 
 Open `browserstack_sample_local.rb` file in `android` or `ios` directory :
 
-- Replace `YOUR_USERNAME` & `YOUR_ACCESS_KEY` with your BrowserStack access credentials
+- Replace `YOUR_USERNAME` & `YOUR_ACCESS_KEY` with your BrowserStack access credentials. Get your BrowserStack access credentials from [here](https://www.browserstack.com/accounts/settings)
 
 - Replace `bs://<app-id>` wkth the URL obtained from app upload step