Test initialization of permission handlers in PermissionManager

src/main/java/fr/xephi/authme/permission/handlers/LuckPermsHandler.java

@@ -36,8 +36,7 @@ public class LuckPermsHandler implements PermissionHandler {
         try {
             luckPermsApi = LuckPerms.getApi();
         } catch (IllegalStateException e) {
-            e.printStackTrace();
-            throw new PermissionHandlerException("Could not get api of LuckPerms");
+            throw new PermissionHandlerException("Could not get api of LuckPerms", e);
         }
     }
 

src/main/java/fr/xephi/authme/permission/handlers/PermissionHandlerException.java

@@ -9,4 +9,8 @@ public class PermissionHandlerException extends Exception {
     public PermissionHandlerException(String message) {
         super(message);
     }
+
+    public PermissionHandlerException(String message, Throwable cause) {
+        super(message, cause);
+    }
 }