I have manually added an end user along with his mail. his ID is 12345.
I set up a trigger for sending a mail to the requester.
I then send a "requests" request with the end user ID as follows:
{

"request": {

"requester": {

"id": 12345

},

"subject": "Test ticket created 3",

"comment": {

"body": "Details of test ticket 3"

}

}

}

I expected that Zendesk will use the end user's ID to send him a mail, but I get:

{

"error": "RecordInvalid",

"description": "Record validation errors",

"details": {

"email": [

{

"description": "Email: cannot be blank",

"error": "BlankValue"

}

]

}

}

Any idea how can I have Zendesk sending a mail to existing end users without specifying their mail in the request, but only use their id?