public ICommand LoginCommand
    {
        get
        {
            return new Command(async () =>
            {
                Message = await _apiServices.LoginAsync(Username, Password);
                if (_apiServices.LastResponse.IsSuccessStatusCode) //login successful?
                {
                    // Check if the user details are complete and if not throw up the Edit page.
                    if (Settings.DetailsComplete)
                    {
                        Application.Current.MainPage = new NavigationPage(new HomePage());
                    }
                    else
                    {
                        await _apiServices.GetUserDetails(); //Check the details from the server
                        Application.Current.MainPage = new NavigationPage(new UserDetails());
                    }
                }
            });
        }
    }

public async Task<bool> GetUserDetails()
    {
        var client = new HttpClient();
        client.DefaultRequestHeaders.Authorization
            = new AuthenticationHeaderValue("Bearer", Settings.AccessToken);
        var model = new RGUserDTOModel();

        //Send and respond
        var json = await client.GetStringAsync(ServerURL + UserDetailsEndPoint);
        var userdetails = JsonConvert.DeserializeObject<RGUserDTOModel>(json);
        UpdateUserSettings(userdetails);
        return true; // allows for error handling
    }

public partial class UserDetails : ContentPage
{
    public UserDetails()
    {
        InitializeComponent();
        BindingContext = new RGUserViewModel();
        Title = "Update your details";
    }

}

<?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         x:Class="xxxxxxGameApp.Views.UserDetails">

  <ContentPage.Content>
    <StackLayout>
        <Label Text="Edit your account details:" />
        <Entry Text="{Binding Email}"
             Placeholder="email"
               FontSize="Large"/>
        <Entry Text="{Binding Id}"
             Placeholder="Id"
               FontSize="Large"/>
        <Entry Text="{Binding Title}"
             Placeholder="Title"
               FontSize="Large"/>
        <Entry Text="{Binding FirstName}"
             Placeholder="FirstName"
               FontSize="Large"/>
        <Entry Text="{Binding MiddleName}"
             Placeholder="MiddleName"
               FontSize="Large"/>
        <Entry Text="{Binding LastName}"
             Placeholder="LastName"
               FontSize="Large"/>
        <Entry Text="{Binding DisplayName}"
             Placeholder="DisplayName"
               FontSize="Large"/>

        <Entry Text="{Binding Password}"
             Placeholder="password"
             IsPassword="False"
               FontSize="Large"/>
        <Button Command="{Binding UpdateCommand}"
                Text="Update Details"
                FontSize="Large"/>

    </StackLayout>
  </ContentPage.Content>
 </ContentPage>

class RGUserViewModel : INotifyPropertyChanged
{

    ApiServices _apiServices = new ApiServices();
    RGUserDTOModel DTOmodel = new RGUserDTOModel();

    public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged([CallerMemberName] string name = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
    }

    private string Id { get; set; } = Settings.Id;

    public string Email { get; set; } = "5678"; //Settings.Email;

    public string UserName { get; set; } = "1234"; //= Settings.Username;

    public DateTime? DateOfBirth { get; set; } = Settings.DateOfBirth;

    public string Title { get; set; } = Settings.Title;

    public string FirstName { get; set; } = Settings.FirstName;

    public string MiddleName { get; set; } = Settings.MiddleName;

    public string LastName { get; set; } = Settings.LastName;

    public string DisplayName { get; set; } = Settings.DisplayName;

    public string FullName
    {
        get
        {
            return FirstName + (MiddleName != null ? " " + MiddleName : "") + (LastName != null ? " " + LastName : "");
        }
    }

    public bool DetailsComplete { get; set; } = Settings.DetailsComplete;

    private string _message { get; set; } = "No Message";
    public string Message
    {
        get { return _message; }
        set
        {
            if (_message != value)
            {
                _message = value;
                OnPropertyChanged();
            }
        }
    }

    public ICommand UpdateCommand
    {
        get
        {
            return new Command(async () =>
            {
                UpdateDTOmodel();       //Move input to the DTOmodel
                var isSuccess = await _apiServices.UpdateUserDetailAsync(DTOmodel);
                if (isSuccess)
                {
                    Message = " Registered Successfully";
                }
                else
                {
                    Message = "Update Error : " + Environment.NewLine + _apiServices.ErrorListasString;
                }

            });
        }
    }

    private void UpdateDTOmodel()
    {
        DTOmodel.Id = Id;
        DTOmodel.Title = Title;
        DTOmodel.FirstName = FirstName;
        DTOmodel.MiddleName = MiddleName;
        DTOmodel.LastName = LastName;
        DTOmodel.DisplayName = DisplayName;
        DTOmodel.DateOfBirth = DateOfBirth;
        DTOmodel.UserName = UserName;
        DTOmodel.Email = Email;
        DTOmodel.DetailsComplete = DetailsComplete;
    }
}