MarkLogic 9 Product Documentationxdmp:get-request-username
xdmp:get-request-username() as xs:string
Summary
If this App Server is using application-level authentication,
returns the username in the last successful call to
xdmp:login.
Otherwise, returns the username from the Authorization
header of this App Server request or the current username.
Example
xdmp:get-request-username() => "fred"