async def METHOD_NAME(
    app: web.Application, *, user_email: str, expiration_in_seconds: int
) -> str:
    """Saves 2FA code with an expiration time, i.e. a finite Time-To-Live (TTL)"""
    redis_client = get_redis_validation_code_client(app)
    code: str = await _do_create_2fa_code(
        redis_client=redis_client,
        user_email=user_email,
        expiration_seconds=expiration_in_seconds,
    )
    return code