My store did not need require client to log in for purchasing product. I was set no log in require in my store. I found multiple lines of error display in event viewer as following: 
 
SqlException: Procedure or function 'Smith_AddShoppingCart' expects parameter '@dnnLogin', which was not supplied. 
 
Is there a way that I can turn off this function? 
 
Any help is greatly appreciated. 
 
Thanks, 
Vincent 
 
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