I have one website with 3 stores. Is it possible that customers of one stores should not be able to loggin to other 2 stores. The customer should not share cart between the stores. Is there an extension for this. Please advice.
By default Magento has support for this function You can access it at: Stores-> Customers-> Customer Configuration-> Account Sharing Options. In the field ""Share Customer Accounts"" select Per Website https://prnt.sc/117xpom