ctx.notify allows you to send notifications from your Workflows. Currently supported channels are email and slack.
ctx.notify will not pause the workflow, if you would like to do so see Human in the Loop.The notification input defined here is the same as what is passed to Interrupt.approval().

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Usage

The following example shows how to send a notification from a workflow

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Email

Emails will be delivered from [email protected]
deleteUserWorkflow.version(1).define(async (ctx, input) => {
  ctx.notify({
    message: "Hello from this workflow!",
    destination: {
      type: "email",
      // The email address to notify
      email: "[email protected]",
    },
  });
  //...
});

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Slack

If enabled, the Slack integration can also be used to notify users / channels. 
deleteUserWorkflow.version(1).define(async (ctx, input) => {
  ctx.notify({
    message: "Hello from this workflow!",
    destination: {
      type: "slack",
      // The email address of the Slack user to notify
      email: "[email protected]",
      // Or Slack user ID
      userId: "U0123456789",
      // Or Slack channel ID
      channelId: "C0123456789",
    },
  });
  //...
});