diff --git a/src/main/java/com/soongsil/CoffeeChat/config/jwt/JWTFilter.java b/src/main/java/com/soongsil/CoffeeChat/config/jwt/JWTFilter.java
index d44b981..288bffa 100644
--- a/src/main/java/com/soongsil/CoffeeChat/config/jwt/JWTFilter.java
+++ b/src/main/java/com/soongsil/CoffeeChat/config/jwt/JWTFilter.java
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 
+import com.soongsil.CoffeeChat.dto.Oauth.UserDTO;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
@@ -10,7 +11,6 @@
 import org.springframework.web.filter.OncePerRequestFilter;
 
 import com.soongsil.CoffeeChat.dto.Oauth.CustomOAuth2User;
-import com.soongsil.CoffeeChat.dto.UserDTO;
 
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
diff --git a/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/CustomOAuth2User.java b/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/CustomOAuth2User.java
index 9e7c6c9..ff04c29 100644
--- a/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/CustomOAuth2User.java
+++ b/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/CustomOAuth2User.java
@@ -7,7 +7,6 @@
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.oauth2.core.user.OAuth2User;
 
-import com.soongsil.CoffeeChat.dto.UserDTO;
 
 public class CustomOAuth2User implements OAuth2User {
 	private final UserDTO userDTO;
diff --git a/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/UserDTO.java b/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/UserDTO.java
index 9e594e4..9ac6a4c 100644
--- a/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/UserDTO.java
+++ b/src/main/java/com/soongsil/CoffeeChat/dto/Oauth/UserDTO.java
@@ -1,4 +1,4 @@
-package com.soongsil.CoffeeChat.dto;
+package com.soongsil.CoffeeChat.dto.Oauth;
 
 import lombok.Getter;
 import lombok.Setter;
diff --git a/src/main/java/com/soongsil/CoffeeChat/service/CustomOAuth2UserService.java b/src/main/java/com/soongsil/CoffeeChat/service/CustomOAuth2UserService.java
index f76fd1a..ff71120 100644
--- a/src/main/java/com/soongsil/CoffeeChat/service/CustomOAuth2UserService.java
+++ b/src/main/java/com/soongsil/CoffeeChat/service/CustomOAuth2UserService.java
@@ -1,18 +1,13 @@
 package com.soongsil.CoffeeChat.service;
 
 import com.soongsil.CoffeeChat.controller.exception.CustomException;
+import com.soongsil.CoffeeChat.dto.Oauth.*;
 import org.springframework.security.oauth2.client.userinfo.DefaultOAuth2UserService;
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserRequest;
 import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
 import org.springframework.security.oauth2.core.user.OAuth2User;
 import org.springframework.stereotype.Service;
 
-import com.soongsil.CoffeeChat.dto.Oauth.CustomOAuth2User;
-import com.soongsil.CoffeeChat.dto.Oauth.GoogleResponse;
-import com.soongsil.CoffeeChat.dto.Oauth.KakaoResponse;
-import com.soongsil.CoffeeChat.dto.Oauth.NaverResponse;
-import com.soongsil.CoffeeChat.dto.Oauth.OAuth2Response;
-import com.soongsil.CoffeeChat.dto.UserDTO;
 import com.soongsil.CoffeeChat.entity.User;
 import com.soongsil.CoffeeChat.repository.User.UserRepository;
 
@@ -30,10 +25,7 @@ public CustomOAuth2UserService(UserRepository userRepository) {
 
 	private User findUserByUsername(String username){
 		return userRepository.findByUsername(username)
-				.orElseThrow(() -> new CustomException(
-						USER_NOT_FOUND.getHttpStatusCode(),
-						USER_NOT_FOUND.getErrorMessage())
-				);
+				.orElse(null);
 	}
 
 	//리소스 서버에서 제공되는 유저정보 가져오기
diff --git a/src/main/java/com/soongsil/CoffeeChat/util/email/EmailUtil.java b/src/main/java/com/soongsil/CoffeeChat/util/email/EmailUtil.java
index 671fc2d..bbe38ac 100644
--- a/src/main/java/com/soongsil/CoffeeChat/util/email/EmailUtil.java
+++ b/src/main/java/com/soongsil/CoffeeChat/util/email/EmailUtil.java
@@ -47,6 +47,7 @@ public String sendAuthenticationEmail(String receiver) throws InterruptedExcepti
 		} catch (Exception e) {
 			// 예외가 발생했을 때 로그를 남기고, 기본 코드 반환 등을 처리
 			System.out.println("SQS 메시지 전송 실패: " + e.getMessage());
+			throw new RuntimeException("메일전송실패");
 		}
 
 		return code;
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 28bfaca..3eb7516 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -13,7 +13,7 @@ spring:
     password: ${DB_PW}
   jpa:
     hibernate:
-      ddl-auto: none
+      ddl-auto: update
       naming:
         physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
     database: mysql