Need Create custom URl for comuincating with a proxy server

[JavadFaghih]

Describe the solution you'd like
hi,
I need a way to use these great library to work with my own back end service, then my back end call Open AI API.
but the buildURL function does not get url port and http scheme.
I need a change on these function to create my own backend url.

something like these:

func buildURL(path: String) -> URL {
var components = URLComponents()
components.scheme = configuration.scheme
components.host = configuration.host
components.port = configuration.port
components.path = path
return components.url!
}