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# Setting up matrix-registration-bot (optional)
The playbook can install and configure [matrix-registration-bot](https://github.com/moan0s/matrix-registration-bot) for you.
The bot allows you to easily **create and manage registration tokens**. It can be used for an invitation-based server,
where you invite someone by sending them a registration token. They can register as normal but have to provide a valid
registration token in a final step of the registration.
See the project's [documentation](https://github.com/moan0s/matrix-registration-bot#supported-commands) to learn what it
does and why it might be useful to you.
## Registering the bot user
By default, the playbook will set use the bot with a username like this: `@bot.matrix-registration-bot:DOMAIN`.
(to use a different username, adjust the `matrix_bot_matrix_registration_bot_matrix_user_id_localpart` variable).
You **need to register the bot user manually** before setting up the bot. You can use the playbook to [register a new user](registering-users.md):
```
ansible-playbook -i inventory/hosts setup.yml --extra-vars='username=bot.matrix-registration-bot password=PASSWORD_FOR_THE_BOT admin=yes' --tags=register-user
```
Choose a strong password for the bot. You can generate a good password with a command like this: `pwgen -s 64 1`.
## Obtaining an admin access token
In order to use the bot you need to add an admin user's access token token to the configuration. As you created an admin user for the
bot, it is recommended to obtain an access token by logging into Element/Schildichat with the bot account
(using the password you set) and navigate to `Settings->Help&About` and scroll to the bottom.
You can expand "Access token" to copy it.
![Obatining an admin access token with Element](assets/obtain_admin_access_token_element.png)
**IMPORTANT**: once you copy the token, just close the Matrix client window/tab. Do not "log out", as that would invalidate the token.
## Adjusting the playbook configuration
Add the following configuration to your `inventory/host_vars/matrix.DOMAIN/vars.yml` file:
```yaml
matrix_bot_matrix_registration_bot_enabled: true
# Token obtained via logging into the bot account (see above)
matrix_bot_matrix_registration_bot_bot_access_token: "syt_bW9hbm9z_XXXXXXXXXXXXXr_2kuzbE"
# Enables registration
matrix_synapse_enable_registration: true
# Restrict registration to users with a token
matrix_synapse_registration_requires_token: true
```
## Installing
After configuring the playbook, run the [installation](installing.md) command again:
```
ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
```
## Usage
To use the bot, create a **non-encrypted** room and invite `@bot.matrix-registration-bot:DOMAIN` (where `YOUR_DOMAIN` is your base domain, not the `matrix.` domain).
In this room send `help` and the bot will reply with all options.
You can also refer to the upstream [Usage documentation](https://github.com/moan0s/matrix-registration-bot#supported-commands).
If you have any questions, or if you need help setting it up, read the [troublshooting guide](https://github.com/moan0s/matrix-registration-bot/blob/main/docs/troubleshooting.md)
or join [#matrix-registration-bot:hyteck.de](https://matrix.to/#/#matrix-registration-bot:hyteck.de).