Expect script to automate login using password file

login.exp

#!/usr/bin/expect
set password [exec cat .pwd]
set timeout -1
# Connect to host, enter password
spawn ssh -o ServerAliveInterval=5 -o ServerAliveCountMax=1 server-name.com
expect {
"Password: " {send "$password\r"; exp_continue}
"password: " {send "$password\r"; interact}
       }