fix: compiler warnings

Author: ProgrammingByPermutation

src/TwitchStreamingTools/ViewModels/Pages/AccountViewModel.cs

@@ -108,7 +108,7 @@ private async void OnCheckApiStatus() {
         if (!string.Equals(api.OAuth?.AccessToken, Configuration.Instance.OAuth.Bearer) ||
             !string.Equals(TwitchUsername, Configuration.Instance.TwitchUsername)) {
           SetCredentials(TwitchUsername, new OAuthResponse {
-            Bearer = api.OAuth.AccessToken,
+            Bearer = api.OAuth!.AccessToken!,
             Refresh = api.OAuth.RefreshToken ?? string.Empty,
             ExpiresUtc = api.OAuth.ExpiresUtc ?? DateTime.MinValue
           });

src/TwitchStreamingTools/Views/MainWindow.axaml.cs

@@ -8,6 +8,8 @@
 
 using Nullinside.Api.Common.Desktop;
 
+using TwitchStreamingTools.ViewModels;
+
 namespace TwitchStreamingTools.Views;
 
 /// <summary>