Fix VRChatLoginResult to indicate successful login

Author: binn

wrapper/VRChat.API/Client/VRChat.cs

@@ -314,7 +314,7 @@ public async Task<VRChatLoginResult> TryLoginAsync(CancellationToken ct = defaul
                 return new VRChatLoginResult(false, exception);
             }
 
-            return new VRChatLoginResult(user == null, null);
+            return new VRChatLoginResult(user != null, null);
         }
 
         public async Task<CurrentUser> LoginAsync(CancellationToken ct = default)
@@ -384,4 +384,4 @@ public async Task<CurrentUser> LoginWithExternalCodeAsync(Func<List<string>, ITw
             return response.StatusCode == HttpStatusCode.OK ? user : null;
         }
     }
-}
+}