WIP making ClientCreate endpoint

IdentityShroud.Core/Contracts/IClientService.cs

@@ -0,0 +1,25 @@
+using IdentityShroud.Core.Model;
+
+namespace IdentityShroud.Core.Contracts;
+
+//public record CreateClientRequest(Guid RealmId, string ClientId, string? Description);
+
+public class ClientCreateRequest
+{
+    public string ClientId { get; set; }
+    public string? Name { get; set; }
+    public string? Description { get; set; }
+    public string? SignatureAlgorithm { get; set; }
+    public bool? AllowClientCredentialsFlow { get; set; }
+}
+
+
+public interface IClientService
+{
+    Task<Result<Client>> Create(
+        Guid realmId,
+        ClientCreateRequest request, 
+        CancellationToken ct = default);
+
+    Task<Client?> GetByClientId(string clientId, CancellationToken ct = default);
+}