feat(sdk): updated auth check to use project properties

Author: rlabbeptc

Kepware.Api.Test/ApiClient/_TestApiClientBase.cs

@@ -100,6 +100,9 @@ protected void ConfigureConnectedClient(
 
             _httpMessageHandlerMock.SetupRequest(HttpMethod.Get, $"{TEST_ENDPOINT}/config/v1/doc")
                 .ReturnsResponse(HttpStatusCode.OK, statusResponse, "application/json");
+
+            _httpMessageHandlerMock.SetupRequest(HttpMethod.Get, $"{TEST_ENDPOINT}/config/v1/project")
+                .ReturnsResponse(HttpStatusCode.OK, "[]", "application/json");
         }
 
         protected Channel CreateTestChannel(string name = "TestChannel", string driver = "Advanced Simulator")

Kepware.Api/KepwareApiClient.cs

@@ -33,6 +33,7 @@ public partial class KepwareApiClient : IKepwareDefaultValueProvider
         private const string ENDPOINT_STATUS = "/config/v1/status";
         private const string ENDPOINT_DOC = "/config/v1/doc";
         private const string ENDPOINT_ABOUT = "/config/v1/about";
+        private const string ENDPOINT_PROJECT = "/config/v1/project";
 
         private readonly ILogger<KepwareApiClient> m_logger;
         private readonly HttpClient m_httpClient;
@@ -243,7 +244,8 @@ private async Task<bool> TestCredentialsAsync(CancellationToken cancellationToke
             bool hasValidCredentials = false;
             try
             {
-                var response = await m_httpClient.GetAsync(ENDPOINT_DOC, cancellationToken).ConfigureAwait(false);
+                
+                var response = await m_httpClient.GetAsync(ENDPOINT_PROJECT, cancellationToken).ConfigureAwait(false);
                 hasValidCredentials = response.IsSuccessStatusCode;
                 if (hasValidCredentials)
                 {