fix: Fixes an occasional ConstraintViolationException that can only…

… be caused by parallel processing of multiple requests from the same IP.

iris-client-bff/src/main/java/iris/client_bff/auth/db/login_attempts/LoginAttemptsService.java

@@ -4,6 +4,7 @@
 
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
+import lombok.Synchronized;
 import lombok.Value;
 import lombok.extern.slf4j.Slf4j;
 
@@ -41,6 +42,7 @@ public void loginSucceeded(String key) {
 		} catch (EmptyResultDataAccessException e) {}
 	}
 
+	@Synchronized
 	public void loginFailed(String key) {
 
 		var keyHash = DigestUtils.md5Hex(key);