Implemented some new test cases

backend/src/main/java/de/grimsi/gameyfin/igdb/IgdbWrapper.java

@@ -60,7 +60,7 @@ public class IgdbWrapper {
         initIgdbClient();
     }
 
-    public void authenticate() {
+    private void authenticate() {
         log.info("Authenticating on Twitch API...");
 
         URI url = UriComponentsBuilder

backend/src/main/java/de/grimsi/gameyfin/igdb/dto/TwitchOAuthTokenDto.java

@@ -2,6 +2,8 @@ package de.grimsi.gameyfin.igdb.dto;
 
 import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;