How to add the WordPress app?
When creating the Bot (or in the Apps tab), open the Apps drop-down menu, select “Wordpress” under “Add New App” and click on connect to continue.
In the pop-up window, Provide valid Wordpress username and password in 'Username' and Password' fields.
The Blog/URL Input field always provide Wordpress base URL. If you login to your wordpress at https://mysite.com/blog/wp-login.php then the URL you need to enter would be https://mysite.com/blog/ (make sure to include the last / )
Click on validate button and save the app
Issue 1: Invalid credentials error while adding the app
To resolve this issue, you will need to verify 2 things.
First, ensure that you added the Blog/URL correctly (including the trailing slash) as explained above.
If this is fine, then check if you have PHP XML RPC installed on your server.
A way to check if the xml rpc is installed on your Blog is to give this in your browser
The browser should show something like "XML-RPC server accepts POST requests only."
If you do not see this, you need to contact your system administrator regarding installing the PHP XML RPC package on your server.