Create many users

Hello,
I want to add many users account programatically .
I had used this code it create the users but without sending email confirmation.

code :

{{groovy}}
def users = [
["Jean", "Valjean"],
["Georges", "Abitbol"],
["Mohamed", "Messaoud"],
]

def allGroup = xwiki.getDocument('XWiki.XWikiAllGroup')

for(user in users){
 fullName = user.get(0) + user.get(1)
 udoc = xwiki.getDocument("XWiki."+fullName)
 uobj = udoc.getObject("XWiki.XWikiUsers", true)
 uobj.set("first_name", user.get(0))
 uobj.set("last_name" , user.get(1))
 uobj.set("email" , user.get(2))
 print("* Registering *" + udoc.fullName + "*\n")
 udoc.save()
 gObj = allGroup.newObject('XWiki.XWikiGroups')
 gObj.set('member',udoc.fullName)
}
allGroup.save()
{{/groovy}}

how we can send mail confirmation in code ???

Regards,
Amina Meck

To send email: http://extensions.xwiki.org/xwiki/bin/view/Extension/Mail%20Sender%20API#HExamples