[FIX] 会員登録の際、コースを直接設定するようにしました。

src/main/java/com/example/demo/app/domain/service/UserService.java

@@ -5,7 +5,7 @@ import com.example.demo.app.presentation.form.UserForm;
 
 public interface UserService {
     
-	void register(UserForm userForm);
+	void register(UserForm userForm, Long courseId);
     
     public void updateCourse(Long userId, Long courseId);
 

src/main/java/com/example/demo/app/domain/service/impl/UserServiceImpl.java

@@ -26,7 +26,7 @@ public class UserServiceImpl implements UserService {
 	private final CourseRepository courseRepository;
 	
 	@Override
-	public void register(UserForm userForm) {
+	public void register(UserForm userForm, Long courseId) {
 
 	UserEntity userEntity = new UserEntity();
 
@@ -48,7 +48,7 @@ public class UserServiceImpl implements UserService {
             goalRepository.findById(userForm.getGoalId()).orElse(null);
 
 	CourseEntity courseEntity =
-            courseRepository.findById(userForm.getCourseId()).orElse(null);
+            courseRepository.findById(courseId).orElse(null);
 
 	userEntity.setQuestionEntity(questionEntity);
 	userEntity.setGoalEntity(goalEntity);