Added authentication

DoxaApi/Models/ApiDocument.cs

@@ -2,6 +2,9 @@
 
 namespace EonaCat.DoxaApi.Models
 {
+    // This file is part of the EonaCat project(s) which is released under the Apache License.
+    // See the LICENSE file or go to https://EonaCat.com/license for full license details.
+
     public sealed class ApiDocument
     {
         [JsonPropertyName("info")]
@@ -15,5 +18,13 @@ namespace EonaCat.DoxaApi.Models
 
         [JsonPropertyName("schemas")]
         public Dictionary<string, SchemaModel> Schemas { get; set; } = new();
+
+        /// <summary>All security schemes available for this API (keyed by scheme id).</summary>
+        [JsonPropertyName("securitySchemes")]
+        public Dictionary<string, SecuritySchemeModel> SecuritySchemes { get; set; } = new();
+
+        /// <summary>Which optional DoxaApi server-side features are enabled, for UI feature detection.</summary>
+        [JsonPropertyName("features")]
+        public ApiFeatureFlags Features { get; set; } = new();
     }
-}
+}