import hashlib

def hash_password(access_code):
    """Hash a password for storing."""
    sha256 = hashlib.sha256()
    sha256.update(access_code.encode('utf-8'))
    return sha256.hexdigest()


def login(access_code):
    hashed_code = hash_password(access_code)
    with open("hashed_codes.txt") as file:
        for line in file:
            if hashed_code in line:
                return True
    return False