Session API is not working after new gitlab update.

After upgrade the gitlab to 10.3.5 from 9.3.6 session login is not working. previously I can able to get the user details by using the below session API. But now this is returning {"error":"404 Not Found"}

C:\Users\test>curl.exe --request POST "https://gitlab.company.com/api/v4/session?login=arunkumar.nagarajan&password=mypassword"
{"error":"404 Not Found"}

Any workaround for this? Any changes in session API because I did not get any proper document for session API.