Fix null check regression

Author: devoxin

plugin/src/main/java/dev/lavalink/youtube/plugin/ClientProvider.java

@@ -1,6 +1,5 @@
 package dev.lavalink.youtube.plugin;
 
-import dev.lavalink.youtube.YoutubeAudioSourceManager;
 import dev.lavalink.youtube.clients.ClientOptions;
 import dev.lavalink.youtube.clients.skeleton.Client;
 import org.slf4j.Logger;
@@ -13,16 +12,6 @@
 public interface ClientProvider {
     Logger log = LoggerFactory.getLogger(ClientProvider.class);
 
-    default String[] getDefaultClients() {
-        String[] clientIdentifiers = new String[YoutubeAudioSourceManager.DEFAULT_CLIENTS.length];
-
-        for (int i = 0; i < clientIdentifiers.length; i++) {
-            clientIdentifiers[i] = YoutubeAudioSourceManager.DEFAULT_CLIENTS[i].getIdentifier();
-        }
-
-        return clientIdentifiers;
-    }
-
     Client[] getClients(String[] clients, OptionsProvider optionsProvider);
 
     default Client[] getClients(ClientReference[] clientValues,

plugin/src/main/java/dev/lavalink/youtube/plugin/YoutubePluginLoader.java

@@ -155,11 +155,11 @@ public AudioPlayerManager configure(AudioPlayerManager audioPlayerManager) {
         Client[] clients;
 
         if (youtubeConfig == null) {
-            log.warn("Config value \"youtube.clients\" was not specified, default clients will be used.");
+            log.warn("Missing youtube config, default clients will be used.");
             clients = YoutubeAudioSourceManager.DEFAULT_CLIENTS;
         } else {
-            if (clientProvider == null) {
-                log.warn("ClientProvider instance is missing! Default clients will be used.");
+            if (clientProvider == null || youtubeConfig.getClients() == null) {
+                log.warn("Missing \"youtube.clients\" or ClientProvider not initialised! Default clients will be used.");
                 clients = YoutubeAudioSourceManager.DEFAULT_CLIENTS;
             } else {
                 clients = clientProvider.getClients(youtubeConfig.getClients(), this::getOptionsForClient);