How to send a Signal from a Client in TypeScript

WorkflowHandle.signal

import { WorkflowClient } from '@temporalio/client';
import { joinSignal } from './workflows';

const client = new WorkflowClient();

const handle = client.getHandle('workflow-id-123');

await handle.signal(joinSignal, { userId: 'user-1', groupId: 'group-1' });