I can't send a transaction uses BitGo API I have a test BitGo account, and there are test wallets. One of this wallet has 1.1000 TBTC (test btc). I want to send transaction uses BitGo API. 

I do this request:

http://localhost:3080/api/v2/tbtc/wallet/"my_wallet_id"/sendcoins

with this headers:
Content-Type application/json
Authorization Bearer "my_token"

and this body:

{
    "address":"address_where_i_send",
    "amount":0.1,
    "walletPassphrase":"my_test_passphrase"
}

and I get this response:

{
    "error": "sub-dust-threshold amount for 2N4ebmhA3FDuPiULXUEu1jBdPc3y2hk1NrD: 0.5",
    "message": "sub-dust-threshold amount for 2N4ebmhA3FDuPiULXUEu1jBdPc3y2hk1NrD: 0.5"
}

Can somebody explain why I have this response, and how fix it?
(I have V2 BTC wallet)

Thanks!
According to BitGo Documentation:


  amount    number  Yes Amount to be sent (in Satoshis), e.g. 0.1 * 1e8 for
  a tenth of a Bitcoin


https://bitgo.github.io/bitgo-docs/#send-coins-to-address

So, the amount should be passed as 0.1 * 1e8 = 10000000