How to get 2 specific data from firebase using Xamarin - xamarin

Question

I've been trying to work on this code example I found online. I want to display the name and email welcome page after I log in but it doesn't show the name only the E-mail
This is the firebasehelper
public static async Task<List<Citizen>> GetAllCitizen()
{
try
{
var citizenlist = (await firebase
.Child("Citizen").OnceAsync<Citizen>()).Select(item =>
new Citizen
{
Email = item.Object.Email,
Password = item.Object.Password,
FirstName= item.Object.FirstName
}).ToList();
return citizenlist;
}
catch (Exception e)
{
Debug.WriteLine($"Error:{e}");
return null;
}
}
//Read
public static async Task<Citizen> GetCitizen(string email, string firstName)
{
try
{
var allCitizen = await GetAllCitizen();
await firebase.Child("Citizen")
.OnceAsync<Citizen>();
return allCitizen.Where(a => a.Email == email).FirstOrDefault();
}
catch (Exception e)
{
Debug.WriteLine($"Error:{e}");
return null;
}
}
This is the WelcomeVM
public class WelcomeVM : INotifyPropertyChanged
{
public WelcomeVM(string email2, string firstName2)
{
FirstName = firstName2;
Email = email2;
}
private string firstName;
public string FirstName
{
get { return firstName; }
set { firstName = value; }
}
private string email;
public string Email
{
get { return email; }
set { email = value; }
}
private string password;
public event PropertyChangedEventHandler PropertyChanged;
The welcome xaml
<ContentPage.Content>
<StackLayout>
<Label Text="{Binding FirstName, StringFormat='Welcome {0}'}" Margin="10" FontSize="25"/>
<Label Text="{Binding Email, StringFormat='Welcome {0}'}" Margin="10" FontSize="20"/>
<Label Text="{Binding FirstName, StringFormat='Welcome {0}'}" Margin="10" FontSize="20"/>
I copied the code that displays the E-mail but it doesn't show the name only the E-mail