Here is a list of all documented files with brief descriptions:

async-dbus-proxy.cpp
async-dbus-proxy.h
authservice.cpp
authservice.h
authsession.cpp
authsession.h
connection-manager.cpp
connection-manager.h
dbusinterface.cpp
dbusinterface.h
debug.cpp
debug.h
identity.cpp
identity.h
identityinfo.cpp
identityinfo.h
libsignoncommon.h
sessiondata.h
signon.h
signonerror.h