Linux Server SOCKS5 Proxy Setup

I need a SOCKS5 proxy server set up on my Linux server. The proxy should require authentication. Specifically, I need it to use a username and password for access.

Ideal Skills:
- Proficient in Linux server management
- Experienced in setting up SOCKS5 proxies
- Knowledgeable in configuring proxy authentication

Please ensure that the setup is secure and efficient.