[Feature] - 카카오 로그인 구현

backend/src/main/java/woowacourse/touroot/authentication/infrastructure/JwtTokenProvider.java

@@ -17,7 +17,8 @@ public class JwtTokenProvider {
 
     public JwtTokenProvider(
             @Value("${security.jwt.token.secret-key}") String secretKey,
-            @Value("${security.jwt.token.expire-length}") long validityInMilliseconds) {
+            @Value("${security.jwt.token.expire-length}") long validityInMilliseconds
+    ) {
         this.secretKey = secretKey;
         this.validityInMilliseconds = validityInMilliseconds;
     }

backend/src/main/java/woowacourse/touroot/authentication/infrastructure/KakaoOauthClient.java

@@ -4,6 +4,7 @@
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.web.client.ClientHttpRequestFactories;
 import org.springframework.boot.web.client.ClientHttpRequestFactorySettings;
+import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.stereotype.Component;
@@ -20,7 +21,6 @@ public class KakaoOauthClient {
     private final String accessTokenRequestUri;
     private final String restApiKey;
     private final String redirectUri;
-
     private final RestClient restClient;
 
     public KakaoOauthClient(
@@ -29,17 +29,21 @@ public KakaoOauthClient(
             @Value("${oauth.kakao.rest-api-key}") String restApiKey,
             @Value("${oauth.kakao.redirect-uri}") String redirectUri
     ) {
+        this.userInformationRequestUri = userInformationRequestUri;
+        this.accessTokenRequestUri = accessTokenRequestUri;
+        this.restApiKey = restApiKey;
+        this.redirectUri = redirectUri;
+        this.restClient = buildRestClient();
+    }
 
+    private RestClient buildRestClient() {
         ClientHttpRequestFactorySettings settings = ClientHttpRequestFactorySettings.DEFAULTS
                 .withConnectTimeout(Duration.ofSeconds(1))
                 .withReadTimeout(Duration.ofSeconds(3));
+
         ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(settings);
 
-        this.userInformationRequestUri = userInformationRequestUri;
-        this.accessTokenRequestUri = accessTokenRequestUri;
-        this.restApiKey = restApiKey;
-        this.redirectUri = redirectUri;
-        this.restClient = RestClient.builder()
+        return RestClient.builder()
                 .requestFactory(requestFactory)
                 .build();
     }
@@ -49,7 +53,7 @@ public OauthUserInformationResponse requestUserInformation(String authorizationC
 
         return restClient.get()
                 .uri(userInformationRequestUri)
-                .header("Authorization", "Bearer " + kakaoAccessTokenResponse.accessToken())
+                .header(HttpHeaders.AUTHORIZATION, "Bearer " + kakaoAccessTokenResponse.accessToken())
                 .retrieve()
                 .toEntity(OauthUserInformationResponse.class)
                 .getBody();

backend/src/main/java/woowacourse/touroot/member/domain/Member.java

@@ -12,7 +12,7 @@
 import woowacourse.touroot.entity.BaseEntity;
 
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-@AllArgsConstructor
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
 @Getter
 @Entity
 public class Member extends BaseEntity {