Напиши две структуры - исходную и нужную
const arr = [{id: "cd489a42-ab35-4559-8ab7-6b1132ba8861", googleId: null, username: "admin"},
{id: "cd489a42-ab35-4559-8ab7-6b1132ba8861", googleId: null, username: "admin"},
{id: "d81afe13-28da-48d4-aa1c-b49be7012e3f", googleId: null, username: "Lapina"},
{id: "9c88631e-408c-4bd4-a255-0d05e7af0c48", googleId: null, username: "mike"},
{id: "ed26a4ca-bcf8-4da1-8814-00d6333848b8", googleId: null, username: "mgs"},
{id: "65be5d6f-e319-462b-a57f-868141720234", googleId: null, username: "Artem"},
{id: "a314b86e-c8ed-4516-bea9-179228c241ef", googleId: null, username: "Miller"},
{id: "efe7fd64-7bc4-43d2-95aa-2df44d09500f", googleId: null, username: "Hlib"},{id: "8856a7d9-5f94-42e2-9bfb-ebf392a67440", googleId: null, username: "Anton"}] - исходная