f3da66a5_elp____REST_Client_Tool_Window__Description
[Tooltip and shortcut] Generate Authorization Header [Description] 
Click this button to open the Generate Authorization Header dialog box and specify your user name and password for accessing the target RESTful Web service through. Based on these credentials WebStorm will generate an authentication header which will be used in basic authentication. Learn more at http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm.
WebStorm 10.0.0 Help :: REST Client Tool Window