wp-calypso/client/data/users/use-delete-user-mutation.js

import { useMutation, useQueryClient } from '@tanstack/react-query';
import { useCallback } from 'react';
import wp from 'calypso/lib/wp';

function useDeleteUserMutation( siteId, queryOptions = {} ) {
	const queryClient = useQueryClient();
	const mutation = useMutation( {
		mutationFn: ( { userId, variables } ) =>
			wp.req.post( `/sites/${ siteId }/users/${ userId }/delete`, variables ),
		...queryOptions,
		onSuccess( ...args ) {
			queryClient.invalidateQueries( {
				queryKey: [ 'users', siteId ],
			} );
			queryOptions.onSuccess?.( ...args );
		},
	} );

	const { mutate } = mutation;

	const deleteUser = useCallback(
		( userId, variables ) => {
			mutate( { userId, variables } );
		},
		[ mutate ]
	);

	return { deleteUser, ...mutation };
}

export default useDeleteUserMutation;