There really is no lecture like this. And it's free,,, As you can see from the time, if you came to study security, please take another lecture.. Are you starting a project tomorrow? Then, you can understand it to some extent just by listening to the examples. In particular, since spring boot 3.2, many things have stopped being supported in security, so I used the official documentation and gpt4, but it didn't work. However, after taking this lecture, I found an example that I could apply right away. Thank you so much. The lecture audio quality is very good, and the explanations are kind. Thank you!