Delete shadow customers

I’m creating a product and make use of the two-legged-authentication-flow, which means that I create shadow customers from my own web server using the REST-API. It confuses me that theses shadow customers never show up anywhere, neither in the product console nor using the GET /v1/products/:productIdOrSlug/customers API command.

During the development process of my server app, I have the need to create test customers. Is it possible to delete these test users again?

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