simplification

src/main/java/sh/okx/rankup/prestige/Prestiges.java

@@ -11,12 +11,12 @@ public class Prestiges extends RankList<Prestige> {
   }
 
   @Override
-  public Prestige getByPlayer(Player player) {
-    Prestige prestige = super.getByPlayer(player);
-    if (prestige == null) {
-      return getFirst();
-    } else {
-      return prestige;
+  public Prestige getFirst() {
+    for (Prestige prestige : ranks) {
+      if (prestige.getRank() == null) {
+        return prestige;
+      }
     }
+    throw new IllegalStateException("No prestige found for first prestige (first prestige is counted as a prestige without a rank set)");
   }
 }