chore: import Musify.WebApi into monorepo (preserving history)

git-subtree-dir: Musify.WebApi
git-subtree-mainline: 9d433868cc
git-subtree-split: ca8750c3b4

Musify.WebApi/WebApi/Authentication/AuthenticationConfiguration.cs

@@ -0,0 +1,39 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace WebApi.Authentication;
+
+public sealed class AuthenticationConfiguration
+{
+    public const string SectionName = "Authentication";
+
+    [Required]
+    [Url]
+    public required string MetadataAddress { get; set; }
+
+    [Required]
+    public required string IssuerAddress { get; set; }
+
+    [Required]
+    public required string AudienceAddress { get; set; }
+
+    [Required]
+    public required string ClientId { get; set; }
+
+    public string? ClientSecret { get; set; }
+
+    [Required]
+    [Url]
+    public required string AuthorizationEndpoint { get; set; }
+
+    [Required]
+    [Url]
+    public required string TokenEndpoint { get; set; }
+
+    [Required]
+    [MinLength(1)]
+    public required string[] Scopes { get; set; }
+
+    public string? ScalarRedirectUri { get; set; }
+
+    public bool RequireHttpsMetadata { get; set; } = true;
+}