working customer post, get and delete

AB.Services.Abstractions/ICustomerService.cs

@@ -5,13 +5,12 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace AB.Services.Abstractions
+namespace AB.Services.Abstractions;
+
+public interface ICustomerService
 {
-    public interface ICustomerService
-    {
-        Task<CustomerDto> CreateAsync(CustomerForCreationDto customerForCreation);
-        Task DeleteAsync(Guid customerId, CancellationToken cancellationToken);
-        Task<IEnumerable<CustomerDto>> GetAllAsync(CancellationToken cancellationToken);
-        Task<CustomerDto> GetByIdAsync(Guid customerId, CancellationToken cancellationToken);
-    }
+    Task<CustomerDto> CreateAsync(CustomerForCreationDto customerForCreation, CancellationToken cancellationToken = default);
+    Task DeleteAsync(Guid customerId, CancellationToken cancellationToken);
+    Task<IEnumerable<CustomerDto>> GetAllAsync(CancellationToken cancellationToken);
+    Task<CustomerDto> GetByIdAsync(Guid customerId, CancellationToken cancellationToken);
 }

AB.Services.Abstractions/ISupplierService.cs

@@ -0,0 +1,11 @@
+using AB.Contracts;
+
+namespace AB.Services.Abstractions;
+
+public interface ISupplierService
+{
+    Task<SupplierDto> CreateAsync(SupplierForCreationDto supplierForCreation);
+    Task DeleteAsync(Guid supplierId, CancellationToken cancellationToken);
+    Task<IEnumerable<SupplierDto>> GetAllAsync(CancellationToken cancellationToken);
+    Task<SupplierDto> GetSupplierByIdAsync(Guid supplierId, CancellationToken cancellationToken);
+}