I maybe missing something very simple, here where is the command "event manager session cli username xxxx" on my Nexus 7710?

n77-vdc2_AGG(config)# event manager session cli username
                                                ^
% Invalid command at '^' marker.
-n77-vdc2_AGG(config)#

as below my setup so far

event manager environment email_from "n77-vdc2@hello.com"
event manager environment email_server "mailrelay.hello.com"
event manager environment email_to "networks@hello.com"
event manager applet track_SLA_98
  event track 98 state down
  action 1.0 cli command "enable"
  action 1.1 syslog msg IPSLA collector 98 timed out
  action 1.2 cli command "tclsh bootflash:scripts/smtp.tcl"

-n77-vdc2_AGG# show file smtp.tcl
set mail_pre "Mailservername: mailrelay.hello.com\n"
append mail_pre "From: n77-vdc2-agg-TUNNEL@hello.com\n"
append mail_pre "To: networks@hello.com\n"
append mail_pre "Cc:\n"
append mail_pre "Subject: Multicast Tunnel down\n\n"
append mail_pre "Multicast Tunnel\n\n"
set mail_msg [uplevel #0 [list subst -nobackslashes -nocommands $mail_pre]]
if [catch {smtp_send_email $mail_msg} result] {
    error $result $errorInfo
}