Still working on getting client credential flow complete, most of the request works but still working on generating the JWT.

IdentityShroud.Api/Apis/Dto/TokenRequestBody.cs

@@ -0,0 +1,21 @@
+using System.Text.Json.Serialization;
+
+namespace IdentityShroud.Core.DTO.OpenId;
+
+public class TokenRequestBody
+{
+    [JsonPropertyName("grant_type")]
+    public GrantTypes GrantType { get; init; }
+
+    /// <summary>
+    /// In most cases required but not when basic auth header is used
+    /// </summary>
+    [JsonPropertyName("client_id")]
+    public string? ClientId { get; init; } = "";
+    
+    [JsonPropertyName("client_secret")]
+    public string? ClientSecret { get; init; }
+    
+    [JsonPropertyName("scope")]
+    public string? Scope { get; init; }
+}