add unauthenticated test

Author: Zechiax

Modrinth.RestClient.Test/EndpointTests.cs

@@ -6,6 +6,7 @@ namespace Modrinth.RestClient.Test;
 public class EndpointTests
 {
     protected IModrinthApi _client = null!;
+    protected IModrinthApi _noAuthClient = null!;
 
     [OneTimeSetUp]
     public void SetUp()
@@ -16,6 +17,7 @@ public void SetUp()
             throw new Exception("MODRINTH_TOKEN environment variable is not set.");
         }
         var userAgent = $"Zechiax/Modrinth.RestClient.Test/{Assembly.GetExecutingAssembly().GetName().Version}";
-        _client = new ModrinthApi(url: ModrinthApi.StagingBaseUrl, userAgent: userAgent , token: token);
+        _client = new ModrinthApi(url: ModrinthApi.StagingBaseUrl, userAgent: userAgent, token: token);
+        _noAuthClient = new ModrinthApi(url: ModrinthApi.StagingBaseUrl, userAgent: userAgent);
     }
 }

Modrinth.RestClient.Test/TestUserEndpoint.cs

@@ -1,4 +1,6 @@
-namespace Modrinth.RestClient.Test;
+using Flurl.Http;
+
+namespace Modrinth.RestClient.Test;
 
 [TestFixture]
 public class TestUserEndpoint : EndpointTests
@@ -40,4 +42,11 @@ public async Task GetUserAsync_WithValidId_ShouldReturnUser()
         Assert.That(user, Is.Not.Null);
         Assert.That(user.Id, Is.EqualTo(currentUser.Id));
     }
+    
+    // Test for current user with unauthenticated client
+    [Test]
+    public void TestGetCurrentUser_Unauthenticated()
+    {
+        Assert.ThrowsAsync<FlurlHttpException>(async () => await _noAuthClient.User.GetCurrentAsync());
+    }
 }

Modrinth.RestClient/Modrinth.RestClient.cs

@@ -1,4 +1,5 @@
-using Flurl.Http;
+using System.Net;
+using Flurl.Http;
 using Modrinth.RestClient.Endpoints.Project;
 using Modrinth.RestClient.Endpoints.Tag;
 using Modrinth.RestClient.Endpoints.Team;
@@ -67,6 +68,11 @@ public ModrinthApi(string? userAgent = null, string? token = null, string url =
             .WithHeader("Accept", "application/json")
             .WithHeader("Content-Type", "application/json");
 
+        _client.Configure(settings =>
+        {
+            settings.OnErrorAsync = HandleFlurlErrorAsync;
+        });
+        
         if (!string.IsNullOrEmpty(token))
         {
             _client.WithHeader("Authorization", token);
@@ -79,4 +85,8 @@ public ModrinthApi(string? userAgent = null, string? token = null, string url =
         Version = new VersionApi(_client);
         VersionFile = new VersionFileApi(_client);
     }
+    
+    private static async Task HandleFlurlErrorAsync(FlurlCall call) {
+        
+    }
 }