how to read secure url from the response object after uploading in php

I tried the following, upload is successful and returns an object as response 

and I received the following response

Cloudinary\Api\ApiResponse Object
(
    [rateLimitResetAt] => 
    [rateLimitAllowed] => 0
    [rateLimitRemaining] => 0
    [headers] => Array
        (
            [Date] => Array
                (
                    [0] => Sat, 28 May 2022 18:58:47 GMT
                )

            [Content-Type] => Array
                (
                    [0] => application/json; charset=utf-8
                )

            [Transfer-Encoding] => Array
                (
                    [0] => chunked
                )

            [Connection] => Array
                (
                    [0] => keep-alive
                )

            [Vary] => Array
                (
                    [0] => Accept-Encoding
                )

            [Status] => Array
                (
                    [0] => 200 OK
                )

            [Cache-Control] => Array
                (
                    [0] => max-age=0, private, must-revalidate
                )

            [X-XSS-Protection] => Array
                (
                    [0] => 1; mode=block
                )

            [X-Request-Id] => Array
                (
                    [0] => a57f3df3ad7ba508ac21009183adb527
                )

            [X-UA-Compatible] => Array
                (
                    [0] => IE=Edge,chrome=1
                )

            [ETag] => Array
                (
                    [0] => "38ba68cdf700d347e507b1f5e15176fe"
                )

            [Server] => Array
                (
                    [0] => cloudinary
                )

        )

    [storage:ArrayObject:private] => Array
        (
            [asset_id] => 68b431d7e07ffeca56af43062eb6da22
            [public_id] => mythumbs/Broccoli
            [version] => 1653764327
            [version_id] => ba3190f6dc801e856e8056ac0e2a8be8
            [signature] => 50974060aa15a82b8fa0e5ee6c49809d82c46189
            [width] => 600
            [height] => 600
            [format] => gif
            [resource_type] => image
            [created_at] => 2022-05-28T18:58:47Z
            [tags] => Array
                (
                )

            [pages] => 1
            [bytes] => 13349
            [type] => upload
            [etag] => fc64f57bcf6066b19f1b7d803298bc25
            [placeholder] => 
            [url] => http://res.cloudinary.com/cloudname/image/upload/v1653764327/mythumbs/Broccoli.gif
            [secure_url] => https://res.cloudinary.com/cloudname/image/upload/v1653764327/mythumbs/Broccoli.gif
            [folder] => mythumbs
            [original_filename] => Broccoli
            [api_key] => 
        )

)

 I want to read the secure url and store it in db. how to do that, I couldn't find any example in the documetation section.