docs: Fixed small issues.

README.md

@@ -42,8 +42,10 @@ builder
 
 - Use through `BiometricAuthentication.Current` or using `IBiometricAuthentication` from DI:
 ```csharp
-var request = new AuthenticationRequestConfiguration ("Prove you have fingers!", "Because without it you can't have access");
-var result = await BiometricAuthentication.Current.AuthenticateAsync(request);
+var result = await BiometricAuthentication.Current.AuthenticateAsync(
+    new AuthenticationRequest(
+        title: "Prove you have fingers!",
+        reason: "Because without it you can't have access"));
 if (result.Authenticated)
 {
     // do secret stuff :)

sample/MainPage.xaml.cs

@@ -13,7 +13,8 @@ protected override async void OnAppearing()
     {
         base.OnAppearing();
 
-        AuthenticationTypeLabel.Text = "Auth Type: " + await BiometricAuthentication.Current.GetAuthenticationTypeAsync();
+        var type = await BiometricAuthentication.Current.GetAuthenticationTypeAsync();
+        AuthenticationTypeLabel.Text = $"Auth Type: {type:G}";
     }
 
     private async void OnAuthenticate(object sender, EventArgs e)
@@ -43,7 +44,9 @@ private async Task AuthenticateAsync(
         StatusLabel.Text = "";
 
         var result = await BiometricAuthentication.Current.AuthenticateAsync(
-            request: new AuthenticationRequest("My App", reason)
+            request: new AuthenticationRequest(
+                title: "My App",
+                reason: reason)
             {
                 // all optional
                 CancelTitle = cancel ?? string.Empty,