convert string to vcFolder

Hello to All, in our Vcenter, each user has a folder with his name.

i have simple workflow that create new VM from Template.

so when user start the workflow - i get the display name of current user and i want that new VM will be create in his folder (by his name).

for example:

// get the display name of user

var user = Server.getCurrentLdapUser();

displayName - user.displayName

//try to set vm folder:

vcFolder = displayName ????

i dont know how to convert the string to vcFoldet object.