You work for an on-line game site. Your job is to develop a program that accepts a user name and password. Write a Python script that prompts users for a user name and password. a. The user name should be at least 8 characters long and is stored in a list such that it can't be used again. The password can only be validated if the following conditions are met: . At least 1 letter between [a-z] and 1 letter between [A-Z]. . At least 1 number between [0-9] . At least 1 character from [$#@]. . Minimum length 8 characters. b. Maximum length 16 characters