How to upload multiple images at once using cloudinary and lumen

I wrote a code in Lumen to upload multiple images at once using cloudinary, but the code doesn't work only the first image gets uploaded.

$images = $request->file('picture');
        $uploaded = [];
        foreach ($images as $image) {
            error_log('for statement fires.');
            Cloudder::upload($image, null, [
                'folder' => '/dog-lovers',
                'discard_original_filename' => true,
            ]);
            $image_uploaded = Cloudder::getResult();
            array_push($uploaded, $image_uploaded['url']);

        }
        return array('message'=>'successful', 'file_url'=>$uploaded);

In the above code, the for statement doesn't get called, because $images isn't an array i guess, so I made $images an array

    $images[] = $request->file('picture');

Now the for statement fires up, but only the first selected image from postman gets uploaded

this is a screenshot from my postman just in case anyone is wondering how i'm uploading via postman

Does anyone have any idea why the other 4 images don't get uploaded and how to fix this?

This solution to this is to make the picture parameter on postman an array, like this picture[]

decided to post the solution incase anyone ran into similar problems