Create a random API key for a user
    :param username:
    :return: Hex encoded SHA512 random string

def gen_api_key(username):
    """
    Create a random API key for a user
    :param username:
    :return: Hex encoded SHA512 random string
    """
    salt = str(os.urandom(64)).encode('utf-8')
    return hash_password(username, salt)