I really enjoyed it But let me tell you what I thought while watching the lecture - The time leap was too long and difficult (It would be ridiculous if I omitted this completely, but when I watched it, that part was the most annoying part, so I wanted it to be over quickly) - It would have been better if there had been a reference to things like refresh tokens in the session section, such as long-term login retention (The default for sessions is 30 minutes, but these days, long-term retention is the norm using tokens, so I thought other people would be curious) - The lecture itself is good because it is easy to understand that it is developing one by one, but when I look it up again later, it takes a long time to find which part to look at, so it would be good to have a summary note that only has the final version (I am trying to look up the core principles of Spring again, and what I have summarized and the lecture notes are the same, but in the end, what I need is the final Spring method, but when I look for that, there is a lot of previous content, so it is a bit difficult to find) I really enjoyed it, thank you~