How to Add User to Attendees Column in Sharepoint Calendar List with SharePointPlus Library

I’m very newless with Sharepoint… I’m trying developt an Add-In solution in Sharepoint Online and I’m using sharepoint Plus library. I want to add a user to Attendees column in a Calendar List, but I don’t know that object or value must pass to make it.

$  SP().list("CalendarList1").add({         Title: "Meeting 1",         EventDate: "2019-04-18 10:00:00",         EndDate: "2019-04-18 11:00:00",         Location: "Conference Room",         Description: "Tes add Users...",         Attendees: "HERE the problem" //<== I try with  SP.FieldUserValue.fromUser("user@domain.onmicrosoft.com"), but it fails     }).then(function (items) {         console.log(items);      }); 

PD: sorry if the question is very basic!

Backend for calendar of users

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Add a “display this only” parameter in Google Calendar URL

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[edit]
The ’embed’ view, as suggested, cannot work since I want to be able to create events in the calendar I’m redirected to.

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I don’t want to schedule a reoccurring meeting, and I don’t want to move last week’s meeting.

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He is on Gmail and has checked his spam folder. Other emails from me arrive in his inbox. He can accept invites from my alternate email if I send a calendar invite. Is there some other setting he needs to change to receive the invitations?

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