Enable "WWBN" plugin and Create an Account.
Wait until you received an email similar to this one. Then you can login from here to submit/update your index or go back to your "WWBN" plugin then login through the setup button.
For adding new index; for the first time the data from your platform will be automatically generated and if you already have an existing data you need to type your other platform url then click generate.
Click the unverified/verified button of your index, A form to input your validation token will pop-up or an alert message that your index is already verified.
Click the edit button of your index, change/update the data for the allowed/editable field then click update button to appy changes.
Changing status of your index to inreview or inactive