private static async Task <Chat> GetChat(TestsFixture testsFixture, string collectionName)
        {
            Chat chat;

            if (int.TryParse(ConfigurationProvider.TestConfigurations.RegularGroupMemberId, out int userId))
            {
                chat = await testsFixture.BotClient.GetChatAsync(userId);
            }
            else
            {
                await testsFixture.UpdateReceiver.DiscardNewUpdatesAsync();

                await testsFixture.SendTestCollectionNotificationAsync(collectionName,
                                                                       $"No value is set for `{nameof(ConfigurationProvider.TestConfigurations.RegularGroupMemberId)}` " +
                                                                       "in test settings.\n" +
                                                                       "An admin should forward a message from non-admin member or send his/her contact."
                                                                       );

                chat = await testsFixture.GetChatFromAdminAsync();
            }

            if (chat.Username is null)
            {
                await testsFixture.SendTestCollectionNotificationAsync(collectionName,
                                                                       $"[{chat.FirstName}](tg://user?id={chat.Id}) doesn't have a username.\n" +
                                                                       "❎ Failing tests...");

                throw new ArgumentNullException(nameof(chat.Username), "Chat member doesn't have a username");
            }

            return(chat);
        }