type BlockAction missing user.username member

[GovernmentHack]

Reproducible in:

Documentation: per the block action payload documentation, you can see that the username is an expected field:

{
  "type": "block_actions",
  "team": {
    "id": "T9TK3CUKW",
    "domain": "example"
  },
  "user": {
    "id": "UA8RXUSPL",
    "username": "jtorrance", // <---- missing member on the type definition
    "team_id": "T9TK3CUKW"
  },

The output of a block action in the Block Kit Builder will also produce a block action with a username:

However in the definition for a block action in https://github.com/slackapi/bolt-js/blob/main/src/types/actions/block-action.ts#L219 the user object is missing the username member:

export interface BlockAction<ElementAction extends BasicElementAction = BlockElementAction> {
  type: 'block_actions';
  actions: ElementAction[];
  team: {
   // ...
  } | null;
  user: {
    id: string;
    name: string;
    team_id?: string; // undocumented
  };

The Slack SDK version

"slack/bolt": "3.13.2",
"slack/logger": "^3.0.0",
"slack/oauth": "^2.6.1",
"slack/socket-mode": "^1.3.2",
"slack/types": "^2.8.0",
"slack/web-api": "^6.8.1",

Node.js runtime version

v18.12.1

OS info

ProductName: macOS
ProductVersion: 13.4.1
ProductVersionExtra: (c)
BuildVersion: 22F770820d
Darwin Kernel Version 22.5.0: Thu Jun 8 22:22:20 PDT 2023; root:xnu-8796.121.3~7/RELEASE_ARM64_T6000

Steps to reproduce:

1. attempt to dereference the payload.user.username field from the output of any block action handler.

Expected result:

no error

Actual result:

type error

Requirements

For general questions/issues about Slack API platform or its server-side, could you submit questions at https://my.slack.com/help/requests/new instead. 🙇

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

[filmaj]

This was fixed in #1910.