If you have stored a password in Safari on your iPhone and would like to change or remove it, tap the Settings icon on your home page:
Scroll down and tap Passwords:
Scroll down the list until you locate smartmls.com (it should display your user name):
Your saved user name and password will appear (your password will be a series of dots, but in this image it has been blanked out). Tap Edit:
Backspace through the current password, enter your new one and tap Done.