PJSIP: Change the user part of the Contact Header

Asterisk Asterisk Support
11

This seams like what I’m after, I may be mistaken though, I tried setting and doesn’t seam to change anything. Do you know what this does?

			<configOption name="contact_user" default="">
				<synopsis>Force the user on the outgoing Contact header to this value.</synopsis>
				<description><para>
					On outbound requests, force the user portion of the Contact header to this value.
				</para></description>
			</configOption>