public async Task <Customer> UpsertAsync(Customer customer) => await _http.PostAsync <Customer, Customer>("customer", customer);
public async Task <Order> UpsertAsync(Order order) => await _http.PostAsync <Order, Order>("order", order);
public async Task <Customer> UpsertAsync(Customer customer) => await _http.PostAsync <Customer, Customer>("customer", customer);
public async Task <Order> UpsertAsync(Order order) => await _http.PostAsync <Order, Order>("order", order);