Added support for 3rd party dependencies in plugins (#434)

plugins/igdb/src/main/kotlin/de/grimsi/gameyfin/plugins/igdb/IgdbPlugin.kt

@@ -1,5 +1,7 @@
 package de.grimsi.gameyfin.plugins.igdb
 
+import com.api.igdb.request.IGDBWrapper
+import com.api.igdb.request.TwitchAuthenticator
 import de.grimsi.gameyfin.pluginapi.gamemetadata.GameMetadata
 import de.grimsi.gameyfin.pluginapi.gamemetadata.GameMetadataFetcher
 import org.pf4j.Extension
@@ -10,13 +12,23 @@ import java.time.Instant
 class IgdbPlugin(wrapper: PluginWrapper) : Plugin(wrapper) {
 
     override fun start() {
-        println("IgdbPlugin.start()")
+        authenticate()
     }
 
     override fun stop() {
         println("IgdbPlugin.stop()")
     }
 
+    private fun authenticate() {
+        // Kotlin example
+        val token = TwitchAuthenticator.requestTwitchToken("CLIENT_ID", "CLIENT_SECRET")
+        if (token == null) {
+            println("Failed to authenticate with Twitch")
+            return
+        }
+        IGDBWrapper.setCredentials("client_id", token.access_token)
+    }
+
     @Extension
     class IgdbMetadataFetcher : GameMetadataFetcher {
         override fun getConfig(): Map<String, String> {