feat(#30): 로그인 API 구현

- 로그인 기능을 구현했어요.
- 로그인시 유저가 존재하지 않거나, 비밀번호가 틀리면 예외가 발생해요.

src/main/java/com/bamdoliro/sinabro/application/auth/LogInUseCase.java

@@ -0,0 +1,42 @@
+package com.bamdoliro.sinabro.application.auth;
+
+import com.bamdoliro.sinabro.domain.auth.exception.PasswordMismatchException;
+import com.bamdoliro.sinabro.domain.auth.exception.WrongLogInException;
+import com.bamdoliro.sinabro.domain.auth.service.TokenService;
+import com.bamdoliro.sinabro.domain.user.domain.User;
+import com.bamdoliro.sinabro.domain.user.domain.value.Password;
+import com.bamdoliro.sinabro.domain.user.exception.UserNotFoundException;
+import com.bamdoliro.sinabro.domain.user.service.UserFacade;
+import com.bamdoliro.sinabro.presentation.auth.dto.request.LogInRequest;
+import com.bamdoliro.sinabro.presentation.auth.dto.response.TokenResponse;
+import com.bamdoliro.sinabro.shared.annotation.UseCase;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@UseCase
+public class LogInUseCase {
+
+    private final UserFacade userFacade;
+    private final TokenService tokenService;
+
+    public TokenResponse execute(LogInRequest request) {
+        User user;
+        try {
+            user = userFacade.getUser(request.getEmail());
+            validate(request.getPassword(), user.getPassword());
+        } catch (UserNotFoundException | PasswordMismatchException e) {
+            throw new WrongLogInException();
+        }
+
+        return TokenResponse.builder()
+                .accessToken(tokenService.generateAccessToken(user.getEmail()))
+                .refreshToken(tokenService.generateRefreshToken(user.getEmail()))
+                .build();
+    }
+
+    private void validate(String actual, Password expected) {
+        if (!expected.match(actual)) {
+            throw new PasswordMismatchException();
+        }
+    }
+}

src/main/java/com/bamdoliro/sinabro/domain/auth/exception/PasswordMismatchException.java

@@ -0,0 +1,10 @@
+package com.bamdoliro.sinabro.domain.auth.exception;
+
+import com.bamdoliro.sinabro.domain.auth.exception.error.AuthErrorProperty;
+import com.bamdoliro.sinabro.shared.error.SinabroException;
+
+public class PasswordMismatchException extends SinabroException {
+    public PasswordMismatchException() {
+        super(AuthErrorProperty.PASSWORD_MISMATCH);
+    }
+}

src/main/java/com/bamdoliro/sinabro/domain/auth/exception/WrongLogInException.java

@@ -0,0 +1,10 @@
+package com.bamdoliro.sinabro.domain.auth.exception;
+
+import com.bamdoliro.sinabro.domain.auth.exception.error.AuthErrorProperty;
+import com.bamdoliro.sinabro.shared.error.SinabroException;
+
+public class WrongLogInException extends SinabroException {
+    public WrongLogInException() {
+        super(AuthErrorProperty.WRONG_LOGIN);
+    }
+}

src/main/java/com/bamdoliro/sinabro/domain/auth/exception/error/AuthErrorProperty.java

@@ -11,7 +11,10 @@ public enum AuthErrorProperty implements ErrorProperty {
     EXPIRED_TOKEN(HttpStatus.UNAUTHORIZED, "만료된 토큰입니다."),
     INVALID_TOKEN(HttpStatus.UNAUTHORIZED, "유효하지 않은 토큰입니다."),
     EMPTY_TOKEN(HttpStatus.UNAUTHORIZED, "인증이 필요합니다."),
-    AUTHORITY_MISMATCH(HttpStatus.FORBIDDEN, "권한이 없습니다.");
+    AUTHORITY_MISMATCH(HttpStatus.FORBIDDEN, "권한이 없습니다."),
+    PASSWORD_MISMATCH(HttpStatus.UNAUTHORIZED, "비밀번호가 일치하지 않습니다."),
+    WRONG_LOGIN(HttpStatus.UNAUTHORIZED, "사용자가 없거나 비밀번호가 일치하지 않습니다.")
+    ;
 
     private final HttpStatus status;
     private final String message;

src/main/java/com/bamdoliro/sinabro/presentation/auth/AuthController.java

@@ -3,6 +3,7 @@
 import com.bamdoliro.sinabro.application.auth.*;
 import com.bamdoliro.sinabro.domain.user.domain.User;
 import com.bamdoliro.sinabro.presentation.auth.dto.request.GoogleTokenRequest;
+import com.bamdoliro.sinabro.presentation.auth.dto.request.LogInRequest;
 import com.bamdoliro.sinabro.presentation.auth.dto.response.TokenResponse;
 import com.bamdoliro.sinabro.shared.auth.AuthenticationPrincipal;
 import com.bamdoliro.sinabro.shared.response.CommonResponse;
@@ -23,6 +24,16 @@ public class AuthController {
     private final LogOutUseCase logOutUseCase;
     private final GoogleAuthWebUseCase googleAuthWebUseCase;
     private final GoogleAuthAppUseCase googleAuthAppUseCase;
+    private final LogInUseCase logInUseCase;
+
+    @PostMapping
+    public SingleCommonResponse<TokenResponse> logIn(
+            @RequestBody @Valid LogInRequest request
+    ) {
+        return CommonResponse.ok(
+                logInUseCase.execute(request)
+        );
+    }
 
     @GetMapping("/google/web/link")
     public SingleCommonResponse<String> getGoogleAuthUrl() {

src/main/java/com/bamdoliro/sinabro/presentation/auth/dto/request/LogInRequest.java

@@ -0,0 +1,18 @@
+package com.bamdoliro.sinabro.presentation.auth.dto.request;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+public class LogInRequest {
+
+    @NotBlank(message = "필수값입니다.")
+    private String email;
+
+    @NotBlank(message = "필수값입니다.")
+    private String password;
+}