Jithin,
I'm not sure that the existing WordPress OpenID Connect plugin is properly implemented. We're in the process of releasing our own plugin for WordPress. ETA for final product is end of April. In the meantime, feel free to help us beta test it :)
[Docs are here.](https://gluu.org/docs-oxd/plugin/php/cms/wordpress/)
Let us know how it goes.
Thanks!