Spring JPA Error

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'shelfBookController': Unsatisfied dependency expressed through field 'repository': Error creating bean with name 'userRepository' defined in com.ShelfSpace.ShelfSpace.repository.UserRepository defined in @EnableJpaRepositories declared on ShelfSpaceApplication: Not a managed type: class com.ShelfSpace.ShelfSpace.model.UserDto
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:787) ~[spring-beans-6.1.10.jar:6.1.10]

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'shelfBookController': Unsatisfied dependency expressed through field 'repository': Error creating bean with name 'userRepository' defined in com.ShelfSpace.ShelfSpace.repository.UserRepository defined in @EnableJpaRepositories declared on ShelfSpaceApplication: Not a managed type: class com.ShelfSpace.ShelfSpace.model.UserDto
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:787) ~[spring-beans-6.1.10.jar:6.1.10]

 @GetMapping("/register")
    public String registerPage(Model model) {
         model.addAttribute("user", new UserDto());
        return "registration"; // This corresponds to registration.html in templates folder
    }
    
    @PostMapping("/registrationPage")
    public String registerUser(@ModelAttribute("user") UserDto dto) {
        UserDetails details = User.builder().username(dto.getName()).
                password(new BCryptPasswordEncoder()
                        .encode(dto.getPassword()))
                .roles("ROLE_USER").build();
        
        repository.saveUser(details);
        
        return "success"; // This corresponds to success.html in templates folder (if you have one)
    }

 @GetMapping("/register")
    public String registerPage(Model model) {
         model.addAttribute("user", new UserDto());
        return "registration"; // This corresponds to registration.html in templates folder
    }
    
    @PostMapping("/registrationPage")
    public String registerUser(@ModelAttribute("user") UserDto dto) {
        UserDetails details = User.builder().username(dto.getName()).
                password(new BCryptPasswordEncoder()
                        .encode(dto.getPassword()))
                .roles("ROLE_USER").build();
        
        repository.saveUser(details);
        
        return "success"; // This corresponds to success.html in templates folder (if you have one)
    }