Make the ticket validation synchronous

[nayyara-airlangga]

As we will only be making one http request in our project (excluding the future plans for optional integration with other frameworks), it is way too overkill to use reqwest which depends on tokio which is asynchronous and multi-threaded for our core feature. I've done some research and it seems this can be done. All we need is to use a minimal http client to make the ticket validation request