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1public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
2        Role roleAdmin = new Role("ROLE_ADMIN");
3        Role roleUser = new Role("ROLE_USER");
4        Role roleGuest = new Role("ROLE_GUEST");
5
6        roleAdmin = roleRepository.save(roleAdmin);
7        roleUser = roleRepository.save(roleUser);
8        roleGuest = roleRepository.save(roleGuest);
9
10        User admin = new User("admin", "John", "Connor", "JConnor@gmail.com",
11                "admin", new HashSet<>(Arrays.asList(roleAdmin, roleUser, roleGuest)));
12
13        User user1 = new User("p_ivanov", "Petr", "Ivanov", "PIvanov@gmail" +
14                ".com", "pass1", new HashSet<>(Collections.singletonList(roleAdmin)));
15
16        User user2 = new User("i_petrov", "Ivan", "Petrov", "IPetrov@gmail" +
17                ".com", "pass2", new HashSet<>(Collections.singletonList(roleUser)));
18
19        User user3 = new User("v_semenovich", "Vasil", "Semenovich", "VSeme" +
20                "@gmail.com", "pass3", new HashSet<>(Arrays.asList(roleGuest, roleUser)));
21
22        userService.saveUser(admin);
23        userService.saveUser(user1);
24        userService.saveUser(user2);
25        userService.saveUser(user3);
26    }