| `allow` | `mfa` | | Support a dynamic resource list by providing a callback that checks whether or not the resource should be allowed. |
| `allow_unregistered?` | `boolean` | false | Whether the Api will support only registered entries or not. |
| `registry` | `module` | | Configure a registry that contains the resources. This option is generally not necessary anymore, and remains for backwards compatibility. Instead, configure resources in this block directly. |
Options for how requests are executed using this Api
### Examples
```
execution do
timeout :timer.seconds(30)
end
```
### Options
| Name | Type | Default | Docs |
| --- | --- | --- | --- |
| `timeout` | `timeout` | 30000 | The default timeout to use for requests using this API. See the [timeouts guide](/documentation/topics/timeouts.md) for more. |
| `trace_name` | `String.t` | | The name to use in traces. Defaults to the last part of the module. See the [monitoring guide](/documentation/topics/monitoring.md) for more |
## authorization
Options for how requests are authorized using this Api. See the [security guide](/documentation/topics/security.md) for more.
### Examples
```
authorization do
authorize :by_default
end
```
### Options
| Name | Type | Default | Docs |
| --- | --- | --- | --- |
| `require_actor?` | `boolean` | false | Requires that an actor has been supplied. |
| `authorize` | `:always \| :by_default \| :when_requested` | :when_requested | When to run authorization for a given request. |