feat: add chat.getUser() for cross-platform user lookups

[bensabic]

• Add UserInfo type and optional getUser() method to the Adapter interface
• Implement on Slack, Discord, Google Chat, GitHub, Linear, and Telegram adapters
• Returns null when user not found, throws ChatError("NOT_SUPPORTED") for adapters without support
• Add "Who Am I" button to the example app
• Add docs with API reference, UserInfo type table, and error handling examples

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
chat	Ready	Preview, Comment, Open in v0	Apr 16, 2026 1:04pm
chat-sdk-nextjs-chat	Ready	Preview, Comment, Open in v0	Apr 16, 2026 1:04pm

[bensabic]

@heyitsaamir any chance we can add Teams support for this?

[heyitsaamir]

@heyitsaamir any chance we can add Teams support for this?

It should be possible!

  const member = await app.api.conversations
    .members(activity.conversation.id)
    .getById(activity.from.id);

Lmk if that doesn't work!

[heyitsaamir]

So the above will get you the member, but it requires the conversation id. Members in Teams aren't global members, but more based on membership of a conversation.

If you want global members, you can do that via graph, but it'll require some graph permissions i believe (User.Read.All).
Then call it like:

const graphUser = await app.graph.call(endpoints.users.get({ 'user-id': activity.from.aadObjectId! }));

[bensabic]

So the above will get you the member, but it requires the conversation id. Members in Teams aren't global members, but more based on membership of a conversation.

If you want global members, you can do that via graph, but it'll require some graph permissions i believe (User.Read.All). Then call it like:

const graphUser = await app.graph.call(endpoints.users.get({ 'user-id': activity.from.aadObjectId! }));

Ah thank you for this! Do you by any chance have time to push it to the PR? Mainly ask as you'd know exactly which methods to use and what to troubleshoot accordingly

[heyitsaamir]

So the above will get you the member, but it requires the conversation id. Members in Teams aren't global members, but more based on membership of a conversation.

If you want global members, you can do that via graph, but it'll require some graph permissions i believe (User.Read.All). Then call it like:

const graphUser = await app.graph.call(endpoints.users.get({ 'user-id': activity.from.aadObjectId! }));

Ah thank you for this! Do you by any chance have time to push it to the PR? Mainly ask as you'd know exactly which methods to use and what to troubleshoot accordingly

Give me a couple of days :). I can include it after this PR goes in?

[bensabic]

So the above will get you the member, but it requires the conversation id. Members in Teams aren't global members, but more based on membership of a conversation.

If you want global members, you can do that via graph, but it'll require some graph permissions i believe (User.Read.All). Then call it like:

const graphUser = await app.graph.call(endpoints.users.get({ 'user-id': activity.from.aadObjectId! }));

Ah thank you for this! Do you by any chance have time to push it to the PR? Mainly ask as you'd know exactly which methods to use and what to troubleshoot accordingly

Give me a couple of days :). I can include it after this PR goes in?

That'd be perfect, thank you so much!