ON https://dev.local/. Connection output:

[29-Nov-2018 22:09:45 UTC] doing access code request
[29-Nov-2018 22:09:45 UTC] Array
(
    [timeout] => 30
    [headers] => Array
        (
            [Content-Type] => application/json
        )

    [body] => {"code":"qQQuo-0gPPYPB+5Ny8hI5LYkLHDp19Xgabl3Jx6z4Qp8TJX8UoDHRkN4+h-u1\/p3","client_id":"1kvmhkgc99ayjsndsorfqlgfrdmns2wytkbafyh8wk9wwstiouygnktzkdkds88j","client_secret":"\\\CLIENT SECRET\\\","grant_type":"authorization_code"}
)

[29-Nov-2018 22:09:46 UTC] got response
[29-Nov-2018 22:09:46 UTC] Array
(
    [headers] => Requests_Utility_CaseInsensitiveDictionary Object
        (
            [data:protected] => Array
                (
                    [date] => Thu, 29 Nov 2018 22:09:46 GMT
                    [server] => Apache/2.2.22 (Debian)
                    [x-frame-options] => SAMEORIGIN
                    [access-control-allow-origin] => *
                    [vary] => Host
                    [content-length] => 218
                    [content-type] => application/json
                )

        )

    [body] => {"access_token":"mbZcKC2CPENN4iTCndCQnHdDmFf5qeoTgZa1iuQv8+TBavsDK0Ar6naIsF55\/RIE","expires_in":7200,"refresh_token":"T3tBNMG23JjRwdo69sgdIXrvECh3NdkFONe0MzEXK7VB5fDDp\/KnwKlooBpzE-G7","expires":"2018-12-29 16:09:46"}
    [response] => Array
        (
            [code] => 200
            [message] => OK
        )

    [cookies] => Array
        (
        )

    [filename] =>
    [http_response] => WP_HTTP_Requests_Response Object
        (
            [response:protected] => Requests_Response Object
                (
                    [body] => {"access_token":"mbZcKC2CPENN4iTCndCQnHdDmFf5qeoTgZa1iuQv8+TBavsDK0Ar6naIsF55\/RIE","expires_in":7200,"refresh_token":"T3tBNMG23JjRwdo69sgdIXrvECh3NdkFONe0MzEXK7VB5fDDp\/KnwKlooBpzE-G7","expires":"2018-12-29 16:09:46"}
                    [raw] => HTTP/1.1 200 OK
Date: Thu, 29 Nov 2018 22:09:46 GMT
Server: Apache/2.2.22 (Debian)
X-Frame-Options: SAMEORIGIN
Access-Control-Allow-Origin: *
Vary: Host
Content-Length: 218
Connection: close
Content-Type: application/json

{"access_token":"mbZcKC2CPENN4iTCndCQnHdDmFf5qeoTgZa1iuQv8+TBavsDK0Ar6naIsF55\/RIE","expires_in":7200,"refresh_token":"T3tBNMG23JjRwdo69sgdIXrvECh3NdkFONe0MzEXK7VB5fDDp\/KnwKlooBpzE-G7","expires":"2018-12-29 16:09:46"}
                    [headers] => Requests_Response_Headers Object
                        (
                            [data:protected] => Array
                                (
                                    [date] => Array
                                        (
                                            [0] => Thu, 29 Nov 2018 22:09:46 GMT
                                        )

                                    [server] => Array
                                        (
                                            [0] => Apache/2.2.22 (Debian)
                                        )

                                    [x-frame-options] => Array
                                        (
                                            [0] => SAMEORIGIN
                                        )

                                    [access-control-allow-origin] => Array
                                        (
                                            [0] => *
                                        )

                                    [vary] => Array
                                        (
                                            [0] => Host
                                        )

                                    [content-length] => Array
                                        (
                                            [0] => 218
                                        )

                                    [content-type] => Array
                                        (
                                            [0] => application/json
                                        )

                                )

                        )

                    [status_code] => 200
                    [protocol_version] => 1.1
                    [success] => 1
                    [redirects] => 0
                    [url] => https://oauth.netviewshop.com/
                    [history] => Array
                        (
                        )

                    [cookies] => Requests_Cookie_Jar Object
                        (
                            [cookies:protected] => Array
                                (
                                )

                        )

                )

            [filename:protected] =>
            [data] =>
            [headers] =>
            [status] =>
        )

)