sending custom user id while logging-in using web sdk

[Michael_Soprano]

I would like to send to Target crm-id while user is logging in. Something like this does not show up on a Target profile. Why is that?

alloy("sendEvent", {
"renderDecisions": true,
"data": {
"__adobe": {
"target": {
"user.crmId": 'crmId-12345'
}
}
}
})