When magento2 store has 3rd parties system integration then we might be need to store 3rd parties data in magento to make relationships.We might be need additional attribute to save 3rd parties data in magento 2. Here is post for create new customer attribute in magento2.https://www.magedad.com/magento-2-create-a-customer-attribute-programmatically-using-setup-data-patch/1. Get Custom Customer Attribute Value Programatically 2. Save Custom Customer Attribute Value Programatically That’s it. We also have other customer related post might be it’s help to you. You…