[FEATURE] Add login function to user service
[FEATURE] Add login function to user service

xdv/gatewayd,whotooktwarden/gatewayd,xdv/gatewayd,Parkjeahwan/awegeeks,crazyquark/gatewayd,whotooktwarden/gatewayd,Parkjeahwan/awegeeks,crazyquark/gatewayd,zealord/gatewayd,zealord/gatewayd