Add Steam auth, platform validators & name gen

RecNet.Infrastructure/Services/Configuration/ConfigService.cs

@@ -8,16 +8,25 @@ public class ConfigService(IServerConfigRepository repository) : IConfigService
 {
     private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);
 
-    public async Task<T?> GetAsync<T>(
+    public async Task<T?> GetAsync<T>(string key, CancellationToken ct = default)
+    {
+        var config = await repository.GetAsync(key, ct);
+        if (config == null)
+            return default;
+
+        return JsonSerializer.Deserialize<T>(config.Value, JsonOptions);
+    }
+
+    public async Task<T> GetAsync<T>(
         string key,
-        T? defaultValue = default,
+        T defaultValue,
         CancellationToken ct = default)
     {
         var config = await repository.GetAsync(key, ct);
         if (config == null)
             return defaultValue;
 
-        return JsonSerializer.Deserialize<T>(config.Value, JsonOptions);
+        return JsonSerializer.Deserialize<T>(config.Value, JsonOptions) ?? defaultValue;
     }
 
     public async Task SetAsync<T>(