// Creates a new user
        async Task CreateUser()
        {
            try
            {
                // Clear dialog values
                createUserDialog.ClearCreateValues();

                if (createUserDialog.ShowDialog(this) == DialogResult.OK)
                {
                    // Get the user data
                    var user = createUserDialog.CreateUserFromDialog();
                    if (user == null)
                    {
                        return;
                    }

                    // Ensure unique username
                    foreach (ListViewItem li in usersListView.Items)
                    {
                        if (li.Text == user.Name)
                        {
                            AppForm.DisplayError("User already exists: " + user.Name, "Create Error");
                            return;
                        }
                    }

                    // Create the user
                    var response = await InfluxDbClient.CreateUserAsync(user.Name, createUserDialog.Password, user.IsAdmin);

                    // Select the user and refresh the window
                    if (response.Success)
                    {
                        SelectedUser = user;
                        await ExecuteRequestAsync();
                    }
                    else
                    {
                        AppForm.DisplayError(response.Body);
                    }

                    // Update interface buttons
                    UpdateUIState();
                }
            }
            catch (Exception ex)
            {
                AppForm.DisplayException(ex);
            }
        }