Man pages matching name dropuser in section 1:

dropuser.1.zh_CN	debian 10 / manpages-zh
dropuser.1.zh_TW	debian 10 / manpages-zh
dropuser.1.zh_CN	debian 11 / manpages-zh
dropuser.1.zh_TW	debian 11 / manpages-zh
dropuser.1.zh_CN	debian 12 / manpages-zh
dropuser.1.zh_TW	debian 12 / manpages-zh