to be used when doing openid authentication. The `openid_cgiurl` must
point to an ikiwiki [[CGI]], and it will need to match the `openid_realm`
to work.
+
+## troubleshooting
+
+See [[plugins/openid/troubleshooting]] for a number of issues that may
+need to be addressed when setting up ikiwiki to accept OpenID logins reliably.