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

# Overview

> A `user` represents a person using Atrium via your application, be it a mobile app, web app, desktop app, etc.

<Info>
  The development environment limits you to 100 users.
</Info>

| Field Name    | Data Type | Description                                                                                     |
| ------------- | --------- | ----------------------------------------------------------------------------------------------- |
| `guid`        | String    | A unique identifier, defined by MX.                                                             |
| `identifier`  | String    | A unique, enforced identifier for the user, defined by you.                                     |
| `is_disabled` | Boolean   | This indicates whether the user has been disabled.                                              |
| `metadata`    | String    | Additional information you can store about this user. MX recommends using JSON-structured data. |