# Other Configurations

## Custom Access Token Generator

By default a 128 bit access token will be generated. If you require a custom token, such as [JWT](http://jwt.io/), specify an object that responds to `.generate(options = {})` and returns a string to be used as the token.

```ruby
Doorkeeper.configure do
  access_token_generator "Doorkeeper::JWT"
end
```

JWT token support is available with [Doorkeeper-JWT](https://github.com/chriswarren/doorkeeper-jwt).

## Custom controllers

By default Doorkeeper's main controller `Doorkeeper::ApplicationController` inherits from `ActionController::Base`. You may want to use your own controller to inherit from, to keep Doorkeeper controllers in the same context than the rest your app:

```ruby
Doorkeeper.configure do
  base_controller 'ApplicationController'
end
```

Also you could override `Doorkeeper::ApplicationMetalController` that is `ActionController::API` by default.

```ruby
Doorkeeper.configure do
  base_metal_controller 'ApplicationController'
end
```

## Customizing errors

If you don't want to use default Doorkeeper error responses you can raise and rescue it's exceptions. All you need is to set configuration option `handle_auth_errors` to `:raise`. In this case Doorkeeper will raise `Doorkeeper::Errors::TokenForbidden`, `Doorkeeper::Errors::TokenExpired`, `Doorkeeper::Errors::TokenRevoked` or other exceptions that you need to care about.

## Other customizations

* [Associate users to OAuth applications (ownership)](https://github.com/doorkeeper-gem/doorkeeper/wiki/Associate-users-to-OAuth-applications-%28ownership%29)
* [CORS - Cross Origin Resource Sharing](https://github.com/doorkeeper-gem/doorkeeper/wiki/%5BCORS%5D-Cross-Origin-Resource-Sharing)
* see more on [Wiki page](https://github.com/doorkeeper-gem/doorkeeper/wiki)


---

# 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://doorkeeper.gitbook.io/guides/configuration/other-configurations.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.