Yes, you can set any page on your WordPress site as the value for redirect_to. You probably do not have to URL encode the redirect_to parameter. Something like this should work:
so by adding “my-wordpress-page” as the redirect it will redirect user to the page he/she was on?
Or did you mean to replace “my-wordpress-page” with the page I want the user redirected to?
You can use the [discourse_sso_client] shortcode on any WordPress page to create a ‘Login with Discourse’ link that will redirect users back to the page that the shortcode was placed on.
There is some documentation on the plugin’s SSO Client tab for the shortcode.
There was a bug in the most recent versions of the plugin that was causing the shortcode to display the ‘Link your account with Discourse’ text for logged in users who had already linked their account. Update to WP Discourse version 1.6.0 to get the fix.