How can i configure user name display in the launchpad?

I Need to display the username insted of "default user" in my application

this is my code from the html file:

window["sap-ushell-config"] = 
   { defaultRenderer: "fiori2", "renderers": 
        { "fiori2" : 
            { "componentData": 
               { "config": 
                 { "enablePersonalization": false, "enableSetTheme": false }
               }
           }
},

How can i display username instead of "DU" on the menu?