Fix OuraServiceUserRepositoryLegacy and OuraRingConfigurationConverter

Author: mpgxvii

kafka-connect-oura-source/src/main/java/org/radarbase/connect/rest/oura/user/OuraServiceUserRepositoryLegacy.java

@@ -63,8 +63,8 @@
  public class OuraServiceUserRepositoryLegacy extends OuraUserRepository {
   Instant MIN_INSTANT = Instant.EPOCH;
 
-  public static final JsonFactory JSON_FACTORY = new JsonFactory();
-   public static final ObjectReader JSON_READER = new ObjectMapper(JSON_FACTORY)
+  protected static final  JsonFactory JSON_FACTORY = new JsonFactory();
+  protected static final  ObjectReader JSON_READER = new ObjectMapper(JSON_FACTORY)
        .registerModule(new JavaTimeModule())
        .reader();
    private static final Logger logger = LoggerFactory.getLogger(OuraServiceUserRepositoryLegacy.class);

oura-library/src/main/kotlin/org/radarbase/oura/converter/OuraRingConfigurationConverter.kt

@@ -48,7 +48,10 @@ class OuraRingConfigurationConverter(
             design = data.get("design").textValue()?.classifyDesign()
             firmwareVersion = data.get("firmware_version").textValue()
             hardwareType = data.get("hardware_type").textValue()?.classifyHardware()
-            setUpAt = if (setupTime == null) null else setupTime.toEpochMilli() / 1000.0
+            setUpAt =
+                setupTime?.toEpochMilli()?.let {
+                    it / 1000.0
+                }
             size = data.get("size").intValue()
         }.build()
     }