sssd and nis expert needed for login issue Linux

I am looking for an expert in sssd and nis to help me with a login issue on my Linux server. I am experiencing a problem where I cannot login at all. The issue is affecting both the sssd and nis services on my server.

Skills and Experience:
- Expertise in sssd and nis configuration and troubleshooting
- Proficiency in Linux system administration
- Knowledge of authentication and login processes on Linux servers