Writing 'expect' scripts for CLI

login.exp

#!/usr/bin/expect

set timeout 300

set MODULUS ../bin/modulus
set USERNAME brandon@modulus.io
set PASSWORD qwerty

spawn $MODULUS login

expect {
  "email:" {send "$USERNAME\r"}
}

expect {
  "password:" {send "$PASSWORD\r"}
}

expect {
  "brandon@modulus.io" {send "\r"}
}