curl -i -X POST "https://api.box.com/2.0/task_assignments" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -H "content-type: application/json" \
     -d '{
       "task": {
         "id": "11446498",
         "type": "task"
       },
       "assign_to": {
         "id": "4823213"
       }
     }'

await client.taskAssignments.createTaskAssignment({
  task: new CreateTaskAssignmentRequestBodyTaskField({
    type: 'task' as CreateTaskAssignmentRequestBodyTaskTypeField,
    id: task.id!,
  }),
  assignTo: {
    id: currentUser.id,
  } satisfies CreateTaskAssignmentRequestBodyAssignToField,
} satisfies CreateTaskAssignmentRequestBody);

client.task_assignments.create_task_assignment(
    CreateTaskAssignmentTask(type=CreateTaskAssignmentTaskTypeField.TASK, id=task.id),
    CreateTaskAssignmentAssignTo(id=current_user.id),
)

await client.TaskAssignments.CreateTaskAssignmentAsync(requestBody: new CreateTaskAssignmentRequestBody(task: new CreateTaskAssignmentRequestBodyTaskField(type: CreateTaskAssignmentRequestBodyTaskTypeField.Task, id: NullableUtils.Unwrap(task.Id)), assignTo: new CreateTaskAssignmentRequestBodyAssignToField() { Id = currentUser.Id }));

try await client.taskAssignments.createTaskAssignment(requestBody: CreateTaskAssignmentRequestBody(task: CreateTaskAssignmentRequestBodyTaskField(type: CreateTaskAssignmentRequestBodyTaskTypeField.task, id: task.id!), assignTo: CreateTaskAssignmentRequestBodyAssignToField(id: currentUser.id)))

client.getTaskAssignments().createTaskAssignment(new CreateTaskAssignmentRequestBody(new CreateTaskAssignmentRequestBodyTaskField.Builder(task.getId()).type(CreateTaskAssignmentRequestBodyTaskTypeField.TASK).build(), new CreateTaskAssignmentRequestBodyAssignToField.Builder().id(currentUser.getId()).build()))

BoxUser user = new BoxUser(api, "user-id")
BoxTask task = new BoxTask(api, "id");
task.addAssignment(user);

user = client.user(user_id='11111')
assignment = client.task(task_id='12345').assign(user)
print(f'Assignment ID is {assignment.id} and is assigned to user {assignment.assigned_to.name}')

// Assign task 11111 to user 22222
var assignmentParams = new BoxTaskAssignmentRequest()
{
    Task = new BoxTaskRequest()
    {
        Id = "11111"
    },
    AssignTo = new BoxAssignmentRequest()
    {
        Id = "22222"
    }
};
BoxTaskAssignment assignment = await client.TasksManager.CreateTaskAssignmentAsync(assignmentParams);

// Assign task 11111 to user 22222
var taskID = '11111';
var userID = '22222';
client.tasks.assignByUserID(taskID, userID)
 .then(assignment => {
  /* assignment -> {
   type: 'task_assignment',
   id: '12345',
   item: 
   { type: 'file',
    id: '33333',
    sequence_id: '0',
    etag: '0',
    sha1: '7840095ee096ee8297676a138d4e316eabb3ec96',
    name: 'script.js' },
   assigned_to: 
   { type: 'user',
    id: '22222',
    name: 'Sample Assignee',
    login: 'assignee@exmaple.com' },
   message: null,
   completed_at: null,
   assigned_at: '2013-05-10T11:43:41-07:00',
   reminded_at: null,
   resolution_state: 'incomplete',
   assigned_by: 
   { type: 'user',
    id: '33333',
    name: 'Example User',
    login: 'user@example.com' } }
  */
 });