Man pages matching name authen::htpasswd in section 3pm:

Authen::Htpasswd.3pm.en	debian 10 / libauthen-htpasswd-perl
Authen::Htpasswd.3pm.en	debian 11 / libauthen-htpasswd-perl
Authen::Htpasswd.3pm.en	debian 12 / libauthen-htpasswd-perl