curl --request POST \
  --url https://api.projectcor.com/v1/tasks/{task_id}/collaborators \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "collaborators": [
    123
  ],
  "reasignEstimate": false
}
'

[
  {
    "id": 123,
    "first_name": "<string>",
    "last_name": "<string>",
    "email": "jsmith@example.com",
    "picture": "<string>",
    "user_position_id": 123,
    "role_id": 123,
    "userPosition": {
      "id": 123,
      "name": "<string>"
    },
    "pivot": {
      "user_id": 123,
      "task_log_id": 123,
      "created_at": "<string>",
      "estimated_by_user": 123
    }
  }
]