private async Task ProcessTeamJoinEvent(SlackEventFullDto <TeamJoinEventDto> slackEventDto) { _userStorage = new UserEntity(); if (slackEventDto.Event.User.IsBot) { return; } string workspaceId = slackEventDto.Event.User.SlackTeamId; string workspaceMemberId = slackEventDto.Event.User.SlackId; SlackUserInfoDto slackUserInfoDto = await _slackService.GetSlackUserInfo(workspaceMemberId); string chatAppMemberEmail = slackUserInfoDto.User.Profile.Email; UserEntity existingUser = await _userStorage.FindAsync(u => u.Email == chatAppMemberEmail); if (existingUser == null) { // User email is not registered to frontend so // register user and also associate new chat app // user to new user entity string username = await GenerateUsername(); string password = GenerateTemporaryPassword(); User user = new User(username, slackUserInfoDto.User.Profile.Email, slackUserInfoDto.User.Timezone, slackUserInfoDto.User.Locale, true, "", slackEventDto.Event.User.Profile.Image192); UserEntity userEntity = _mapper.Map <UserEntity>(user); userEntity.HashedPassword = HashPassword(user, password); UserEntity newUser = await _userStorage.CreateAsync(userEntity); ChatAppUserEntity newChatAppUser = new ChatAppUserEntity() { WorkspaceId = workspaceId, WorkspaceMemberId = workspaceMemberId, UserId = newUser.Id, }; await _chatAppUserStorage.CreateAsync(newChatAppUser); string message = Messages.OnboardingMessage(workspaceMemberId, user.Email, password); await _slackService.ChatPostMessage(workspaceMemberId, message); await _slackService.ChatPostMessage(_privateRegistrationChannelId, $"<@{workspaceMemberId}>, `{username}`, `{user.Email}` joined the slack group. Send follow up."); } else { // User email is already register to frontend // associate new chat user record with existing user // TODO: Picture may be overwritten here if member // previously uploaded a profile pic through frontend, // remove once we have profile upload functionality on UI. existingUser.ProfilePictureUrl = slackEventDto.Event.User.Profile.Image192; ChatAppUserEntity newChatAppUser = new ChatAppUserEntity() { WorkspaceId = workspaceId, WorkspaceMemberId = workspaceMemberId, UserId = existingUser.Id, }; await _userStorage.UpdateAsync(existingUser); await _chatAppUserStorage.CreateAsync(newChatAppUser); string message = Messages.OnboardingRegisteredMessage(workspaceMemberId); await _slackService.ChatPostMessage(workspaceMemberId, message); await _slackService.ChatPostMessage(_privateRegistrationChannelId, $"<@{workspaceMemberId}>, `{existingUser.Username}`, `{existingUser.Username}` registered and joined the slack group. Send follow up."); } return; }