app/code/Magento/CustomerGraphQl/README.md
This module provides type and resolver information for the GraphQl module to generate customer information endpoints.
Before installing this module, note that the Magento_CustomerGraphQl module is dependent on the following modules:
Magento_GraphQlMagento_CustomerBefore disabling or uninstalling this module, note that the following modules depend on this module:
Magento_WishlistGraphQlFor information about a module installation, see Enable or disable modules.
Extension developers can interact with the Magento_CustomerGraphQl module. For more information about the extension mechanism, see Plugins.
The dependency injection mechanism enables you to override the functionality of the Magento_CustomerGraphQl module.
You can get more information about GraphQl in the Adobe Developer documentation.
customer query - returns information about the logged-in customer, store credit history and customer's wishlistisEmailAvailable query - checks whether the specified email has already been used to create a customer account. A value of true indicates the email address is available, and the customer can use the email address to create an accountLearn more about customer query. Learn more about isEmailAvailable query.