Unable to get user info on the landing page after social login

I am trying to use Social login with WordPress. I know there are lots of readily available plugins for this to achieve but for my project purpose I have to achieve the use case by using Javascript and APIs. For this purpose, I am using LoginRadius APIs. I am able to get the social login widget on my wordpress login page and I am able to login successfully but the problem is that after successful login , when I am redirected to my blog(landing page), the expected behivor is to get a message on Upper right hand corner saying “Howdy <username>” and on the left hand side pane one should get “Log Out” option.

But what is happening is that I am not getting any welcome message on upper right hand corner and I still see the option “Log In” in the left hand pane of my blog.

I guess the problem is that I am unable to display the user info on wordpress , though user info is collected by loginRadius.

Can someone help me how to achieve my use case? how to extract user info and show it on my webpage? Where is the wordpress hook for this?Which file I need to change?