Hello, 할수있다12! Thank you so much for leaving such a truly grateful and good course review. As the instructor, I feel a deep sense of reward hearing that you received practical help regarding authentication. I sincerely hope that 할수있다12's skills will shine wonderfully in the new area of web development in the future as well. If you need anything or have any questions, please feel free to contact me anytime! Thank you once again for your valuable course review, and I wish you always the best!