def register():
    username = input("Please input your desired usernamen")
    password = input("Please input your desired passwordn")
    file = open("accountfile.txt", "a")
    file.write(username)
    file.write(" ")
    file.write(str(password))
    file.write("n")
    file.close()
    if login():
        print("You are now logged in...")
    else:
        print("You aren't logged in!")


def login():
    username = input("Please enter your usernamen")
    password = input("Please enter your passwordn")
    for line in open("accountfile.txt", "r").readlines():
        login_info = line.split()
        if username == login_info[0] and password == login_info[1]:
            print("Correct credentials!")
            return True
    print("Incorrect credentials.")
    return False