Hello Nishit thank you for that the last login IP record could be placed somewhere on that page say in the right corner under the frame you did. “Last Login IP #### – % DATE %, % TIME %
couple more points:
1) On this page http://portal.voip.us/admin/changepassword we can see the password change, but are we able to change username & email or is the developer2 /admin account linked to Telinta?
2) On admin login page front end please make a forgot pass link as well. If the admin account linked to Telinta then it will be easy for you as you have already written that script.
Please ensure that notification emails say that Admin Password Change so we know what email about what:)