public async Task AccountsTest()
        {
            _handler.Expect(HttpMethod.Get, $"{BaseUri}user/accounts")
            .WithoutContent()
            .RespondJsonFromFile("accounts-response");

            var response = await _context.AccountsAsync();

            var expectedResponse = new object[]
            {
                new Account(BrokerAccountType.Tinkoff, "SB000000"),
                new Account(BrokerAccountType.TinkoffIis, "SB000001")
            };

            response.Should().BeEquivalentTo(expectedResponse);
        }