private async Task SaveUser(string receiverId, string giverId) { Console.WriteLine("Save User started for " + receiverId + " " + giverId); var client = new AmazonDynamoDBClient(); var response = await client.ScanAsync(new ScanRequest("user")); List <string> userList = new List <string>(); //Add receiver id var userFromDb = response.Items?.Find(i => (i["id"].S == receiverId)); if ((userFromDb == null) || userFromDb?.ToList().Count <= 0) { userList.Add(receiverId); } //Add giver id userFromDb = response.Items?.Find(i => (i["id"].S == giverId)); if ((userFromDb == null) || userFromDb?.ToList().Count <= 0) { userList.Add(giverId); } if (userList.Count > 0) { //get user name from slack var slackMsg = new SlackMessage(new DynamoRepository()); var slackUsers = slackMsg.GetUsers(userList).Distinct().ToList(); List <AwsDotnetCsharp.Models.User> users = new List <AwsDotnetCsharp.Models.User>(); foreach (var slackUser in slackUsers) { Console.WriteLine("Adding new user to db : Name " + slackUser.name); var newUser = new Document { ["guid"] = Guid.NewGuid().ToString(), ["id"] = slackUser.id, ["name"] = slackUser.name, ["userimage"] = slackUser.profile.image_72, ["totalbevans"] = 0 }; var table = Table.LoadTable(client, "user"); await table.PutItemAsync(newUser); Console.WriteLine("User saved"); } ; } }