按照以下网站上的说明进行操作时，我陷入了第 2 步。
https://developers.google.com/assistant/smarthome/tools/smart-home-test-suite
单击“交换令牌的授权码”后，我没有收到任何代码，而是出现401 Unauthorized错误。
不知道在此测试期间出了什么问题，因为该操作本身运行良好。
这是 OAuth 游乐场的输出：
Host: oauth.teletask.be
Content-length: 169
content-type: application/x-www-form-urlencoded
user-agent: google-oauth-playground
code=XIspHj&redirect_uri=https%3A%2F%2Fdevelopers.google.com%2Foauthplayground&client_id=***********&client_secret=************&scope=&grant_type=authorization_code
HTTP/1.1 401 Unauthorized
X-xss-protection: 1; mode=block
X-content-type-options: nosniff
Transfer-encoding: chunked
Expires: 0
Www-authenticate: Basic realm="oauth2/client"
Server: nginx/1.14.1
Connection: keep-alive
Pragma: no-cache
Cache-control: no-cache, no-store, max-age=0, must-revalidate
Date: Thu, 21 Nov 2019 14:59:59 GMT
Strict-transport-security: max-age=31536000 ; includeSubDomains
Content-type: application/json;charset=UTF-8
X-frame-options: DENY
{
"status": 401,
"timestamp": "2019-11-21T14:59:59.599+0000",
"message": "Unauthorized",
"path": "/auth/oauth/token",
"error": "Unauthorized"
}