1 00:00:02,070 --> 00:00:03,750 Up to this point in the course, 2 00:00:03,750 --> 00:00:06,860 you already learned a lot about web development, 3 00:00:06,860 --> 00:00:08,740 about front-end web development 4 00:00:08,740 --> 00:00:12,170 and building nice websites with HTML, CSS, 5 00:00:12,170 --> 00:00:14,550 and browser side JavaScript, 6 00:00:14,550 --> 00:00:17,390 and you learned a lot about back-end development, 7 00:00:17,390 --> 00:00:22,160 also about data storage with databases and file uploads. 8 00:00:22,160 --> 00:00:27,040 But one super important concept and feature is missing, 9 00:00:27,040 --> 00:00:30,350 a feature which you don't need on every website, 10 00:00:30,350 --> 00:00:32,470 but on a lot of websites, 11 00:00:32,470 --> 00:00:36,220 and that would be user authentication. 12 00:00:36,220 --> 00:00:37,520 In this course section, 13 00:00:37,520 --> 00:00:39,590 you are going to learn how you can add 14 00:00:39,590 --> 00:00:42,680 user authentication to any website, 15 00:00:42,680 --> 00:00:46,820 so how you can enable users to sign up and create profiles 16 00:00:46,820 --> 00:00:50,603 and then log in with their credentials into your website. 17 00:00:51,500 --> 00:00:53,060 Now, of course, as mentioned, 18 00:00:53,060 --> 00:00:55,010 not every website needs that. 19 00:00:55,010 --> 00:00:56,450 If you're building a blog 20 00:00:56,450 --> 00:01:00,820 where visitors should only be able to read your blog posts, 21 00:01:00,820 --> 00:01:05,620 those visitors don't need to log in necessarily. 22 00:01:05,620 --> 00:01:07,990 But, of course, a lot of websites do. 23 00:01:07,990 --> 00:01:09,560 If you're building an online shop 24 00:01:09,560 --> 00:01:11,890 where users can place orders, 25 00:01:11,890 --> 00:01:14,710 you might need an account for every user 26 00:01:14,710 --> 00:01:18,140 so that users have to log in and in their account, 27 00:01:18,140 --> 00:01:22,780 they can then view their past orders, things like that. 28 00:01:22,780 --> 00:01:24,170 And because of that, 29 00:01:24,170 --> 00:01:26,560 it's, of course, super important as a web developer 30 00:01:26,560 --> 00:01:28,920 to know how authentication works 31 00:01:28,920 --> 00:01:32,020 and how you can add it to a website. 32 00:01:32,020 --> 00:01:33,890 And hence, that's exactly what we'll cover 33 00:01:33,890 --> 00:01:35,910 in this course section. 34 00:01:35,910 --> 00:01:39,040 You will first learn what exactly authentication is 35 00:01:39,040 --> 00:01:40,650 and how it works, 36 00:01:40,650 --> 00:01:42,680 and then we're going to implement it. 37 00:01:42,680 --> 00:01:46,570 We're going to implement sign up and log in functionalities 38 00:01:46,570 --> 00:01:49,553 on a demo website in this course section. 39 00:01:50,440 --> 00:01:53,350 And you will learn that for authentication, 40 00:01:53,350 --> 00:01:56,070 there are two extremely important concepts 41 00:01:56,070 --> 00:01:59,620 in web development which you absolutely have to know 42 00:01:59,620 --> 00:02:02,650 in order to implement authentication. 43 00:02:02,650 --> 00:02:05,270 And that would be sessions and cookies. 44 00:02:05,270 --> 00:02:07,170 These are two concepts 45 00:02:07,170 --> 00:02:10,620 which are not just used for authentication, 46 00:02:10,620 --> 00:02:12,900 you can also use them for other things 47 00:02:12,900 --> 00:02:14,680 as you will learn in this section, 48 00:02:14,680 --> 00:02:18,030 but they are super important for authentication. 49 00:02:18,030 --> 00:02:20,670 So whilst you can use them for other things, 50 00:02:20,670 --> 00:02:24,930 user authentication, as we will cover it in this section, 51 00:02:24,930 --> 00:02:27,950 won't work without sessions and cookies. 52 00:02:27,950 --> 00:02:30,310 And therefore, this will be a feature 53 00:02:30,310 --> 00:02:32,640 and knowledge-packed course section 54 00:02:32,640 --> 00:02:35,700 with a lot of new knowledge for you and therefore, 55 00:02:35,700 --> 00:02:38,393 let's not waste any time and dive right in.