User info not available for permission_callback?

I’m trying to create an endpoint for an admin dashboard widget, but it seems like the API loads before any user information loads. current_user_can($anything) and is_user_logged_in() always return false, even if I’m logged in as an admin.

Here’s the code in my plugin file:

add_action( 'rest_api_init', function() {
    register_rest_route('my_plugin', '/list', array(
        'methods' => 'GET',
        'callback' => 'myplug_rest_query',
		'permission_callback' => function() {
            return current_user_can('edit_dashboard');
        } //Always gives me a 403
    ) );
} );

function myplug_rest_query(WP_REST_Request $request) {
	return current_user_can('edit_dashboard');
	//Always false, when I remove the permission callback
}

The add_action code is copied straight from the documentation?–?any idea why it’s not working?