being like:
/plm user <name> login set <name> has joined in a blazing fire
and
/plm user <name> login remove

and on the logout:
/plm user <name> logout set <name> has left the game in a bright light
and
/plm user <name> logout remove

-----------------------------------------------------

and on the group side:
/plm group <group> login set <name> has joined after sleeping all day
and
/plm user <group> login remove

and on the logout:
/plm group <group> logout set <name> has left the game out of rage!
and
/plm group <group> logout remove

thank you for reading and good luck!