Adding proxy in HttpClientHandler

Hello. Could you add the use of a proxy to the extension configuration? (add if not exist)

RestHandler (source):

public RestHandler(ILogger logger)
{
	HttpClientHandler handler = new HttpClientHandler
	{
		AutomaticDecompression = (DecompressionMethods.GZip | DecompressionMethods.Deflate),
		UseCookies = false
	};
	Client = new HttpClient(handler)
	{
		Timeout = TimeSpan.FromSeconds(30.0),
		BaseAddress = new Uri("https://discord.com/api/v10/")
	};
	...
}
​

With proxy:

public RestHandler(ILogger logger)
{
        WebProxy proxy = new WebProxy()
        {
            Credentials = new NetworkCredential("user", "pwd"),
            Address = new Uri("http://proxy.net"),
         };
	HttpClientHandler handler = new HttpClientHandler
	{
		AutomaticDecompression = (DecompressionMethods.GZip | DecompressionMethods.Deflate),
		UseCookies = false,
                Proxy = proxy
	}; 
	Client = new HttpClient(handler)
	{
		Timeout = TimeSpan.FromSeconds(30.0),
		BaseAddress = new Uri("https://discord.com/api/v10/")
	};
        ...
}

Hey, can you add me on Discord "MJSU". I can send you a version to test to see if everything is working.