update documentation about logging in to WordPress as admin

docs/testing.rst

@@ -102,14 +102,12 @@ free to skip it now if that’s not convenient at this point.
 Wordpress
 ~~~~~~~~~
 
-Please try to login as the new user you created earlier by pressing “Log
-in” and using the ``Login with OpenID Connect`` button.
-
-At the moment Administrator privileges will not be available for single
-sign-on users of WordPress. You can sign in with the automatically
-created administrator account. The username is ``admin`` and the
-password can be found in the ``wordpress_admin_password`` file in the
-``secrets`` folder of your provisioning machine’s config directory.
+Using the link in the dashboard app, please try to log in to WordPress as the
+user you created earlier by pressing “Log in” and using the ``Login with OpenID
+Connect`` button.
+
+Your user needs "Admin" privileges to edit the website.
+
 
 Providing feedback
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