Fix C++ Deribit API Authentication

I'm seeking a skilled professional to diagnose and fix an authentication failure in my C++ trading code when connecting to the Deribit API. This issue is preventing me from managing my trading accounts effectively.

Key Requirements:
- Identify and resolve authentication issues with the Deribit API
- Proficiency in C++ programming
- Experience with the Deribit API is highly desirable
- Strong troubleshooting skills in a Windows environment

Ideal Skills and Experience:
- Expertise in C++ and API integration
- Familiarity with authentication methods such as OAuth or API keys
- Ability to work independently and efficiently to restore trading functionality

Your expertise will help me resume my trading activities smoothly. If you have the necessary skills and experience, I look forward to your assistance.