> ## Documentation Index
> Fetch the complete documentation index at: https://botmesh.afaya.com.co/llms.txt
> Use this file to discover all available pages before exploring further.

# UserId

> Type alias exported by @botmesh/core.

```ts theme={null}
type UserId = string;
```

Defined in: [core/provider.ts:44](https://github.com/andresayac/botmesh/blob/main/packages/core/src/core/provider.ts#L44)

A user/sender identifier. Opaque.


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