curl --request POST \
  --url https://{instance}.omniapp.co/api/scim/v2/users \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "displayName": "<string>",
  "userName": "jsmith@example.com",
  "urn:omni:params:1.0:UserAttribute": {}
}
'

{
  "id": "<string>",
  "userName": "<string>",
  "displayName": "<string>",
  "meta": {
    "resourceType": "User",
    "created": "2023-11-07T05:31:56Z",
    "lastModified": "2023-11-07T05:31:56Z"
  },
  "schemas": [
    "<string>"
  ]
}