# Users: App Users

You can add user(s) per app and apply [user roles](/stacker-classic/permissions-and-security/set-up-user-roles.md) and [permissions](/stacker-classic/permissions-and-security/configure-a-permission-rule/table-permissions.md) to them.

## Add Users from an external table

1. Click **Manage users**
2. Click **Choose Table**
3. Choose a table with your users
4. Select the email address field
5. Select [manual](https://support.stackerhq.com/hc/en-us/articles/4409591836179#h_01GWTA38NB562KZFKHQV2MG1N8) if you want to manually toggle on certain users
6. Select [automatic](https://support.stackerhq.com/hc/en-us/articles/4409591836179#h_01GWTA3K7W5M217BTMFARDA6Y9) if you want to import the whole list
7. Click Save

![Screen\_Recording\_2022-06-22\_at\_17.05.23.2022-06-22\_17\_08\_03.gif](https://support.stackerhq.com/hc/article_attachments/7188383769363/Screen_Recording_2022-06-22_at_17.05.23.2022-06-22_17_08_03.gif)

To remove, click on the cog next to the table and press disconnect

## Add Users directly into Stacker

If you do not have a user table you can add users directly into Stacker.

1. Click **Manage users**
2. Enter their email address
3. Select a role
4. Click **Invite**
5. Remove the user by clicking the 3 dots '...' next to their email address
6. Change the role of the user at any time by selecting the role dropdown

![app\_users.gif](https://support.stackerhq.com/hc/article_attachments/7188502577427/app_users.gif)

* You cannot have multiple external user tables
* You cannot invite users directly into Stacker on top of an external user table


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.stackerhq.com/stacker-classic/users/users-app-users.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.