dirac-admin-add-shifter
Adds or modify a shifter, in the operations section of the CS
Usage:
dirac-admin-add-shifter [options] ... ShifterRole UserName DIRACGroup
Arguments:
ShifterRole: Name of the shifter role, e.g. DataManager
UserName: A user name, as registered in Registry section
DIRACGroup: DIRAC Group, e.g. diracAdmin (the user has to have this role)