diff --git a/Microservice.Customer.Api/Helpers/CustomerHttpAccessor.cs b/Microservice.Customer.Api/Helpers/CustomerHttpAccessor.cs
index 92e3472..73502f3 100644
--- a/Microservice.Customer.Api/Helpers/CustomerHttpAccessor.cs
+++ b/Microservice.Customer.Api/Helpers/CustomerHttpAccessor.cs
@@ -13,7 +13,7 @@ public Guid CustomerId
 
             var customerId = accessor.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier);
 
-            return customerId == null ? throw new ArgumentNullException("NameIdentifier not found with customer Id") : new(customerId);
+            return customerId == null ? throw new ArgumentNullException("NameIdentifier not found with customer Id.") : new(customerId);
         }
     }
 }
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