full_name = first_name + " " + second_name
while full_name != "Name Name":
    for full_name in "Namer Name":
        print("Hey! Welcome Back!!!")
    input(full_name + " is not recognised, please go away.n")

good_people = {"Jim Jones", "Haile Selassie", "Papa Doc"}

def pause(prompt="Hit Enter to continue:"):
    input(prompt)

def main():
    first_name = input("What's your first name? ")
    last_name = input("What's your last name? ")

    full_name = first_name.strip() + " " + last_name.strip()

    if full_name in good_people:
        print("Welcome back, {}!".format(first_name))
        # you are now logged in
    else:
        print("I don't know any {}, go away!".format(full_name))
        pause()

if __name__=="__main__":
    main()