Api-Platform IriConverter Symfony context - symfony

Question

My service (a console command) is receiving the IRI strings as arguments (I have this requirement, instead using the ids, that would be way more simple). So I have injected the ApiPlatform's IriConverter to my service, but when I call its getItemFromIri method I'm getting this error:
The token storage contains no authentication token. One possible reason may be that there is no firewall configured for this URL.
My Service:
use ApiPlatform\Core\Api\IriConverterInterface;
....
$context= []; // don't know what to include here
$iri= '/api/v4/files/448';
$file = $this->iriConverter->getItemFromIri($iri, $context);
My security.yml
firewalls:
apiV4:
pattern: ^/api/v4
stateless: true
fos_oauth: true
My Class
/**
* File
* #ApiResource(
* attributes={
* "normalization_context"={"groups"={"fileUpload"}}
* },
* collectionOperations = {
* "get",
* "post" ={
* "method"="POST",
* "path"="/files",
* "controller"= UploadFileAction::class,
* "defaults"={"_api_receive"=false},
* }
* }
* )
*
* #ORM\Table(name="UploadedFile")
*
*/
class File
{
/**
* #var int
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
* #Groups({"fileUpload"})
*/
private $id;
/**
* #var string
* #Assert\NotBlank
* #ORM\Column(name="name", type="string", length=255)
* #Groups({"fileUpload"})
*/
private $name;
....