binance-connector-node: testnet always respond with 401

using binance-connector-node testnet always respond with 401

example:

import { Spot }  from '@binance/connector'
// apiKey and apiSecret from https://testnet.binancefuture.com
const apiKey= "testnetApiKey";
const apiSecret= "testnetApiSecret";

const spotClient = new Spot(apiKey, apiSecret, {
  baseURL: 'https://testnet.binance.vision',
})

spotClient.account().then( console.log );

response:

{
    "message": "Request failed with status code 401",
    "name": "Error",
    "stack": "Error: Request failed with status code 401\n    at createError (node_modules/axios/lib/core/createError.js:16:15)\n    at settle (node_modules/axios/lib/core/settle.js:17:12)\n    at IncomingMessage.handleStreamEnd (node_modules/axios/lib/adapters/http.js:269:11)\n    at IncomingMessage.emit (node:events:402:35)\n    at IncomingMessage.emit (node:domain:475:12)\n    at endReadableNT (node:internal/streams/readable:1343:12)\n    at processTicksAndRejections (node:internal/process/task_queues:83:21)",
    "config": {
        "url": "/api/v3/account?timestamp=1640794495823&signature=****************************************************************",
        "method": "get",
        "headers": {
            "Accept": "application/json, text/plain, */*",
            "Content-Type": "application/json",
            "X-MBX-APIKEY": "****************************************************************",
            "User-Agent": "@binance/connector-node/1.6.0"
        },
        "baseURL": "https://testnet.binance.vision",
        "transformRequest": [
            null
        ],
        "transformResponse": [
            null
        ],
        "timeout": 0,
        "xsrfCookieName": "XSRF-TOKEN",
        "xsrfHeaderName": "X-XSRF-TOKEN",
        "maxContentLength": -1,
        "maxBodyLength": -1,
        "transitional": {
            "silentJSONParsing": true,
            "forcedJSONParsing": true,
            "clarifyTimeoutError": false
        }
    },
    "response.data": {
        "code": -2015,
        "msg": "Invalid API-key, IP, or permissions for action."
    }
}

binance-connector-node doesn’t support endpoints from Futures API, only Spot, so using apiKey and apiSecret from https://testnet.binancefuture.com is not valid.

API credentials for the SPOT testnet can be obtained via the testnet’s site.

https://testnet.binance.vision/