add mineskin api key to config

common/src/main/java/net/lionarius/skinrestorer/config/provider/MineskinProviderConfig.java

@@ -10,6 +10,7 @@ public class MineskinProviderConfig implements BuiltInProviderConfig, GsonPostPr
     private boolean enabled;
     private String name;
     private CacheConfig cache;
+    private String apiKey;
     
     public MineskinProviderConfig() {
         this.enabled = true;
@@ -29,6 +30,10 @@ public class MineskinProviderConfig implements BuiltInProviderConfig, GsonPostPr
         return cache;
     }
     
+    public String apiKey() {
+        return apiKey;
+    }
+    
     @Override
     public void gsonPostProcess() {
         if (this.name == null || this.name.isEmpty()) {
@@ -42,5 +47,10 @@ public class MineskinProviderConfig implements BuiltInProviderConfig, GsonPostPr
         } else {
             this.cache.validate(DEFAULT_CACHE_VALUE);
         }
+        
+        if (this.apiKey == null) {
+            SkinRestorer.LOGGER.warn("Mineskin API key is null, defaulting to an empty string");
+            this.apiKey = "";
+        }
     }
 }

common/src/main/java/net/lionarius/skinrestorer/skin/provider/MineskinSkinProvider.java

@@ -45,11 +45,14 @@ public final class MineskinSkinProvider implements SkinProvider {
     }
     
     public static void reload() {
+        var config = SkinRestorer.getConfig();
+        var configApiKey = config.providersConfig().mineskin().apiKey();
+        
         MINESKIN_CLIENT = MineSkinClient
                 .builder()
                 .userAgent(WebUtils.USER_AGENT)
                 .gson(JsonUtils.GSON)
-                .timeout((int) Duration.ofSeconds(SkinRestorer.getConfig().requestTimeout()).toMillis())
+                .timeout((int) Duration.ofSeconds(config.requestTimeout()).toMillis())
                 .requestHandler((userAgent, apiKey, timeout, gson) -> new Java11RequestHandler(
                         userAgent,
                         apiKey,
@@ -57,6 +60,7 @@ public final class MineskinSkinProvider implements SkinProvider {
                         gson,
                         SkinRestorer.getConfig().proxy().map(proxy -> new InetSocketAddress(proxy.host(), proxy.port())).orElse(null)
                 ))
+                .apiKey(configApiKey.isEmpty() ? null : configApiKey)
                 .build();
         
         createCache();