10 clients with the highest total number of purchases

It is necessary to form a list of ten clients with the maximum total number of purchased goods. Use the 'amount' column from the 'carts' table for calculations.

-- Table "public.carts"
-- Column     | Type                        | Modifiers
-- -----------|-----------------------------|-----------------------------
-- sku        | bigint                      | not null
-- country    | country_enum                | not null
-- customer_id| bigint                      |
-- amount     | bigint                      | not null
-- updated_at | timestamp without time zone| default now()

-- Table "public.customer"
-- Column | Type  | Modifiers
-- -------|-------|----------------
-- id     | bigint| not null
-- email  | text  | not null