auth: requestToken close response body

[johanneslarsson]

Why the changes in this PR are needed?

We are currently leaking sockets. These are open unclosed sockets from 7 days ago

ls -l /proc/1/fd/*|grep socket
lrwx------    1 core     core            64 Apr 16 13:00 /proc/1/fd/3 -> socket:[22595818]
lrwx------    1 core     core            64 Apr 16 13:00 /proc/1/fd/7 -> socket:[94892]
lrwx------    1 core     core            64 Apr 16 13:00 /proc/1/fd/8 -> socket:[22592372]
lrwx------    1 core     core            64 Apr 16 13:00 /proc/1/fd/9 -> socket:[22589424]

What are the changes in this PR?

Close the response body after requesting a token