created tables

lib/data/dao/user_group.dart

@@ -0,0 +1,26 @@
+import 'package:game_tracker/data/database.dart';
+import 'package:drift/drift.dart';
+
+extension UserGroupMethods on AppDatabase {
+  Future<List<UserGroupData>> getAllUsersAndGroups() async {
+    return await select(userGroup).get();
+  }
+
+  Future<List<UserGroupData>> getUsersGroups(String userId) async {
+    return await (select(userGroup)..where((uG) => uG.userId.equals(userId))).get();
+  }
+
+  Future<List<UserGroupData>> getGroupsUsers(String groupId) async {
+    return await (select(userGroup)..where((uG) => uG.groupId.equals(groupId))).get();
+  }
+
+  Future<void> addUserToGroup(String userId, String groupId) async {
+    await into(userGroup).insert(
+      UserGroupCompanion.insert(userId: userId, groupId: groupId),
+    );
+  }
+
+  Future<void> removeUserFromGroup(String userId, String groupId) async {
+    await (delete(userGroup)..where((uG) => uG.userId.equals(userId) & uG.groupId.equals(groupId))).go();
+  }
+}