On login screen add icon to allow viewing of password. An eye icon is the norm.
With the number of passwords being used having the option to view the password typed allows for corrections of miss-typed entries. Use of an eye icon to see the type password is becoming common.
Adrian Crowley commented
Now that the password requirements are more complex it would be very helpful to be able to see the passwords as you are typing, instead of a row of dots, when you renew or change your password.