BUG: UnityWebRequest fails behind authenticated corporate proxies (Windows)

[njannink]

The Wit.ai unity package appears to rely on UnityWebRequest for outbound HTTPS calls to Wit.ai.

In Windows enterprise environments that use authenticated corporate proxies, these requests fail.

Environment

• Unity 2022.x (Windows standalone)
• Meta XR SDK 78.0.0
• Domain-joined Windows machine
• Authenticated corporate proxy

Possible solutions

• Allow developers to inject a custom HTTP transport (e.g., HttpClient) instead of UnityWebRequest.
• Only use UnityWebRequest for WebGL platform use HttpClient for other platforms