How to send authorisation parameters over URL

I am trying to send authorisation parameters ( username and password ) over a http POST request, I would expect an authorisation token as response which I should include in all the future request's header.
The session url format is as follows,
http://192.168.37.236/api/session?user=STRING&password=STRING
I am trying http://192.168.5.29/api/session?user=info@ideaworld.com&password=WeAre4Build with the help of http request node, but I am getting output from the node as error: "The provided content-type '' is not supported."