Have you used it for authentication-type stuff, and/or can recommend anything in that direction? I'm trying to build a homelab to learn from, and I was curious

Have you used it for authentication-type stuff, and/or can recommend anything in that direction? I'm trying to build a homelab to learn from, and I was curious about using it for something security related like auth/IAM stuff. Like a touch of spice to enhance the flavour profile of an otherwise Linux-heavy dish!