diff --git a/.packages b/.packages
index d3d9e43..b7b7b0b 100644
--- a/.packages
+++ b/.packages
@@ -3,7 +3,7 @@
 # 
 # For more info see: https://dart.dev/go/dot-packages-deprecation
 # 
-# Generated by pub on 2022-02-04 14:06:34.601754.
+# Generated by pub on 2022-02-05 00:00:57.539877.
 async:file:///Users/moritz.fink/.pub-cache/hosted/pub.dartlang.org/async-2.8.2/lib/
 charcode:file:///Users/moritz.fink/.pub-cache/hosted/pub.dartlang.org/charcode-1.3.1/lib/
 collection:file:///Users/moritz.fink/.pub-cache/hosted/pub.dartlang.org/collection-1.15.0/lib/
diff --git a/example/README.md b/example/README.md
index 5d99ba2..7df6233 100644
--- a/example/README.md
+++ b/example/README.md
@@ -1,19 +1,26 @@
 # The Lord of the Rings API
 
 ```
+import 'package:lotr_api/lotr_api.dart';
+
+void main() async {
   var lotrApi = LotrApi(
     apiKey: 'INSERT_YOUR_API_ACCESS_KEY_HERE',
   );
 
-  Response<Quote> quotes = await lotrApi.getQuotes(
-    sorting: QuoteSortings.byDialogAsc,
+  var quotes = await lotrApi.getQuotes(
     pagination: Pagination(
       limit: 10,
-      offset: 2,
     ),
+    sorting: QuoteSortings.byIdAsc,
+    idFilters: [
+      Exists(),
+    ],
     dialogFilters: [
-      MatchesRegex('Frodo'),
+      MatchesRegex('Saruman'),
     ],
   );
-  print(quotes);
+
+  print(quotes.docs);
+}
 ```
diff --git a/lib/lotr_api.dart b/lib/lotr_api.dart
index c6f315a..e38dc92 100644
--- a/lib/lotr_api.dart
+++ b/lib/lotr_api.dart
@@ -1,5 +1,3 @@
-export 'src/config/api_version.dart' show ApiVersion;
-
 export 'src/model/book.dart' show Book;
 export 'src/model/chapter.dart' show Chapter;
 export 'src/model/character.dart' show Character;
@@ -17,6 +15,7 @@ export 'src/query/filter/impl/includes.dart' show Includes;
 export 'src/query/filter/impl/less_than.dart' show LessThan;
 export 'src/query/filter/impl/less_than_or_equals.dart' show LessThanOrEquals;
 export 'src/query/filter/impl/matches.dart' show Matches;
+export 'src/query/filter/impl/matches_regex.dart' show MatchesRegex;
 export 'src/query/filter/impl/not_equals.dart' show NotEquals;
 export 'src/query/filter/impl/not_exists.dart' show NotExists;
 export 'src/query/filter/impl/not_matches.dart' show NotMatches;
diff --git a/lib/src/config/api_version.dart b/lib/src/config/api_version.dart
deleted file mode 100644
index 4c9cc59..0000000
--- a/lib/src/config/api_version.dart
+++ /dev/null
@@ -1 +0,0 @@
-enum ApiVersion { v2 }
diff --git a/lib/src/lotr_api.dart b/lib/src/lotr_api.dart
index 840354f..ec14b67 100644
--- a/lib/src/lotr_api.dart
+++ b/lib/src/lotr_api.dart
@@ -9,8 +9,8 @@ import 'package:lotr_api/src/query/sorting/character/character_sorting.dart';
 import 'package:lotr_api/src/query/sorting/movie/movie_sorting.dart';
 import 'package:lotr_api/src/query/sorting/quote/quote_sorting.dart';
 import 'package:lotr_api/src/query/sorting/sorting.dart';
+import 'package:lotr_api/src/util/utils.dart';
 
-import 'config/api_version.dart';
 import 'model/book.dart';
 import 'model/chapter.dart';
 import 'model/character.dart';
@@ -22,14 +22,16 @@ import 'query/pagination/pagination.dart';
 
 class LotrApi {
   final String? apiKey;
-  final ApiVersion apiVersion;
 
   late final String _baseUrl;
 
   LotrApi({
     this.apiKey,
-    this.apiVersion = ApiVersion.v2,
   }) {
+    if (apiKey == null) {
+      Utils.printWarning(
+          'No API key provided. Only open endpoints will be available.');
+    }
     _baseUrl = "https://the-one-api.dev/v2";
   }