Fix detecting floodgate on plugin name

Floodgate's name is lowercase
Related #630

bungee/src/main/java/com/github/games647/fastlogin/bungee/FastLoginBungee.java

@@ -86,7 +86,7 @@ public class FastLoginBungee extends Plugin implements PlatformPlugin<CommandSen
             return;
         }
 
-        if (isPluginInstalled("Floodgate")) {
+        if (isPluginInstalled("floodgate")) {
             floodgateService = new FloodgateService(FloodgateApi.getInstance(), core);
         }
 

bungee/src/main/java/com/github/games647/fastlogin/bungee/listener/ConnectListener.java

@@ -161,8 +161,8 @@ public class ConnectListener implements Listener {
 
     private void setOfflineId(InitialHandler connection, String username) {
         try {
-            final UUID oldPremiumId = connection.getUniqueId();
-            final UUID offlineUUID = UUIDAdapter.generateOfflineId(username);
+            UUID oldPremiumId = connection.getUniqueId();
+            UUID offlineUUID = UUIDAdapter.generateOfflineId(username);
 
             // BungeeCord only allows setting the UUID in PreLogin events and before requesting online mode
             // However if online mode is requested, it will override previous values