feat(#30): Exception Handling

- 임시로 RuntimeException으로 했던 오류를 커스텀 예외로 만들었어요.

src/main/java/com/bamdoliro/sinabro/application/user/SignUpUseCase.java

@@ -3,6 +3,9 @@
 import com.bamdoliro.sinabro.domain.user.domain.User;
 import com.bamdoliro.sinabro.domain.user.domain.Verification;
 import com.bamdoliro.sinabro.domain.user.domain.type.Authority;
+import com.bamdoliro.sinabro.domain.user.exception.UserAlreadyExistsException;
+import com.bamdoliro.sinabro.domain.user.exception.VerifyingHasFailedException;
+import com.bamdoliro.sinabro.domain.user.service.VerificationFacade;
 import com.bamdoliro.sinabro.infrastructure.persistence.user.UserRepository;
 import com.bamdoliro.sinabro.infrastructure.persistence.user.VerificationRepository;
 import com.bamdoliro.sinabro.presentation.user.dto.request.SignUpRequest;
@@ -16,6 +19,7 @@ public class SignUpUseCase {
 
     private final UserRepository userRepository;
     private final VerificationRepository verificationRepository;
+    private final VerificationFacade verificationFacade;
 
     @Transactional
     public void execute(SignUpRequest request) {
@@ -32,15 +36,14 @@ public void execute(SignUpRequest request) {
     }
 
     private void validate(SignUpRequest request) {
-        Verification verification = verificationRepository.findById(request.getEmail())
-                .orElseThrow(RuntimeException::new);
+        Verification verification = verificationFacade.getVerification(request.getEmail());
 
         if (!verification.getIsVerified()) {
-            throw new RuntimeException();
+            throw new VerifyingHasFailedException();
         }
 
         if (userRepository.existsByEmail(request.getEmail())) {
-            throw new RuntimeException();
+            throw new UserAlreadyExistsException();
         }
 
         verificationRepository.delete(verification);

src/main/java/com/bamdoliro/sinabro/domain/user/exception/UserAlreadyExistsException.java

@@ -0,0 +1,10 @@
+package com.bamdoliro.sinabro.domain.user.exception;
+
+import com.bamdoliro.sinabro.domain.user.exception.error.UserErrorProperty;
+import com.bamdoliro.sinabro.shared.error.SinabroException;
+
+public class UserAlreadyExistsException extends SinabroException {
+    public UserAlreadyExistsException() {
+        super(UserErrorProperty.USER_ALREADY_EXISTS);
+    }
+}