def createUser():

    """
    check usernames doesn't already exist
    check passwords inputs are the same
    and basic password strength test e.g. length, numbers, specail chars
    invalid chars not in data? might not be needed
    """
    NewUser=raw_input("Type your user name >>>")

    if UserExists(NewUser):
        Password=getpass.getpass("Type your password >>>")
        PasswordC=getpass.getpass("Confirm your password >>>")
        if Password==PasswordC:
            for index in range(len(Password)):
                if Password[index] in ALL:
                    passwordSafe = True
                else:
                    passwordSafe = False
        if passwordSafe:
            UsernamePsw=str("\n"+NewUser+","+Password)
            FileOpen=open("users.csv","a")
            FileOpen.write(UsernamePsw)
            FileOpen.close()
            Login()
    createUser()