In ffb1311e56 the port was updated to
0.6.55, which unfortunately broke some functionality in gdm.
Add the patch from OpenBSD to fix this.
Reported by: rm
Obtained from: https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/ports/sysutils/accountsservice/patches/patch-src_libaccountsservice_act-user-manager_c
PR: 249445