does any know how retrieve the list of all returning customers and New Cutomers by APi?
I don't find any information about it in https://shopify.dev/api/admin-rest/2021-07/resources/customer#[get]/admin/api/2021-07/customers.json
Thanks for your answer.
It gets the whole customer of the store from the API. API is not providing the information is like the new and old customers. If you want to find this information then you will have to do some alternatives like in the response of this API will find some date field 'created_at, updated_at, and updated_at_min'.
So that you will have to bifurcate customers for new and old customer e.g the date is today date then this is a new customer and past date is the old customer.
Request method: Get
I suggest please first try on postman and also replaced your API credential instead of the host URL that I provided then pass the URL in the postman then you will get the result of customers.