For getting a Bing Maps key, please follow below steps:

1- Open https://www.bingmapsportal.com/ website and click sign in button.

2- If you have a live.com account, login with your live account otherwise create a new account and then login to live.com.

3- After that you should redirect to https://www.bingmapsportal.com/Account Then open "My Keys" menu under "My Account menu".

4- Then create a new key and submit the form.

5- Finally copy the key that you created and then use it in WPL Bing Maps activity.