fix(account): secure login response, add validation, global exception handler

backend/mci-server/src/test/java/com/sino/mci/admin/controller/AccountControllerTest.java

@@ -6,6 +6,7 @@ import org.springframework.boot.webmvc.test.autoconfigure.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.http.MediaType;
 import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.util.UUID;
 
@@ -15,6 +16,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 
 @SpringBootTest
 @AutoConfigureMockMvc
+@Transactional
 public class AccountControllerTest {
 
     @Autowired