Update User.java

remove println. I also noticed this printline used to print https://api.intercom.io//users/xxx with a double slash, so you probably also want to remove the trailing slash in Intercom.java:

 private static final URI API_BASE_URI = URI.create("https://api.intercom.io/");

However, haven't tested this for all methods
Merge branch 'patch-1' of git://github.com/YousefED/intercom-java into YousefED-patch-1
Merge branch 'YousefED-patch-1'