create new servicegroup and user for login to nagios core

I want to create new servicegroup . currently I have two service group :
define servicegroup {
servicegroup_name TT
alias TT Group
}
define servicegroup {
servicegroup_name SS
alias SS Group
}
I add follow :
define servicegroup {
servicegroup_name GG
alias GG Group
}
now my current .cfg file is such as follow that assigned to TT group
define service{
use local-service
host_name mob
service_description Mob port
servicegroups TT
check_command check_nrpe!check_port!
}
1- Do I have to change it as follow if want also GG group can show it ?
define service{
use local-service
host_name mob
service_description Mob port
servicegroups TT
servicegroups GG
check_command check_nrpe!check_port!
}
2- How can create a user on nagios that can see follow service ?
define service{
use local-service
host_name mob
service_description Mob port
servicegroups TT
servicegroups GG
check_command check_nrpe!check_port!
}
define servicegroup {
servicegroup_name TT
alias TT Group
}
define servicegroup {
servicegroup_name SS
alias SS Group
}
I add follow :
define servicegroup {
servicegroup_name GG
alias GG Group
}
now my current .cfg file is such as follow that assigned to TT group
define service{
use local-service
host_name mob
service_description Mob port
servicegroups TT
check_command check_nrpe!check_port!
}
1- Do I have to change it as follow if want also GG group can show it ?
define service{
use local-service
host_name mob
service_description Mob port
servicegroups TT
servicegroups GG
check_command check_nrpe!check_port!
}
2- How can create a user on nagios that can see follow service ?
define service{
use local-service
host_name mob
service_description Mob port
servicegroups TT
servicegroups GG
check_command check_nrpe!check_port!
}