re-add caching (featuring Redis!!!!!)

src/main/java/cc/fascinated/bat/service/UserService.java

@@ -5,6 +5,8 @@ import cc.fascinated.bat.repository.UserRepository;
 import lombok.NonNull;
 import lombok.extern.log4j.Log4j2;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.annotation.CachePut;
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.context.annotation.DependsOn;
 import org.springframework.stereotype.Service;
 
@@ -32,7 +34,7 @@ public class UserService {
      * @param id The ID of the user
      * @return The user
      */
-//    @Cacheable(cacheNames = {"users"}, key = "#id")
+    @Cacheable(cacheNames = {"users"}, key = "#id")
     public BatUser getUser(@NonNull String id) {
         long start = System.currentTimeMillis();
         Optional<BatUser> optionalUser = userRepository.findById(id);
@@ -49,7 +51,7 @@ public class UserService {
      *
      * @param user The user to save
      */
-//    @CachePut(cacheNames = {"users"}, key = "#id")
+    @CachePut(cacheNames = {"users"}, key = "#user.id")
     public void saveUser(@NonNull BatUser user) {
         userRepository.save(user);
     }