Indicates if user is authorized to modify specific supplier. 
            For global supplier: 'EcommerceGlobalModify' permission is checked. 
            For site-specific supplier: 'EcommerceModify' OR 'ModifySuppliers' permission is checked.
            
Namespace: CMS.EcommerceAssembly: CMS.Ecommerce (in CMS.Ecommerce.dll) Version: 8.0.0.0 (8.0.5239.26125)
Parameters
- supplier
 - Type: CMS.Ecommerce SupplierInfo
Supplier to be checked 
- siteName
 - Type: 
System String
Site name 
- user
 - Type: CMS.Base IUserInfo
User to be checked 
Return Value
Type:See Also