Updates UWP tutorial based on author feedback

Author: waldekmastykarz

articles/active-directory/develop/tutorial-v2-windows-uwp.md

@@ -237,7 +237,9 @@ Eventually, the `AcquireTokenSilent` method fails. Reasons for failure include a
 
 ### Instantiate the Microsoft Graph Service Client by obtaining the token from the SignInUserAndGetTokenUsingMSAL method
 
-In the project, create a new file named *TokenProvider.cs* with the following code:
+In the project, create a new file named *TokenProvider.cs*: right-click on the project, select **Add > New Item > Blank Page**.
+
+Add to the newly created file the following code:
 
 ```csharp
 using Microsoft.Kiota.Abstractions.Authentication;
@@ -266,7 +268,10 @@ namespace UWP_app_MSGraph {
 }
 ```
 
-This class defines a custom access token provider that executes the specified delegate method to get and and return an access token.
+> [!TIP]
+> After pasting the code, make sure that the namespace in the *TokenProvider.cs* file, matches the namespace of your project. This will allow you to more easily reference the `TokenProvider` class in your project.
+
+The `TokenProvider` class defines a custom access token provider that executes the specified delegate method to get and and return an access token.
 
 Add the following new method to *MainPage.xaml.cs*: