how can use age-restriction ?

[icwbot]

##question

hi sir how can i use age-restriction for safe search ?
i tried like this
googleit({
query: "my input",
safe: "high",//already tried "active", "on","true"
ageRestriction: true,
disableConsole: true
}).then(results => {
message.channel.send(results[0])
})
but nothing works.