发出POST请求以获取访问令牌时出错

Question

我一直在尝试通过邮递员中的发帖请求获取针对SharePoint的REST API调用的访问令牌。我仔细检查了所有要求和步骤，发出POST请求时遇到错误。

以下是标头：

grant_type: authorization_code
client_id: XXXXXXXXXXXXXXXXXX
client_secret: XXXXXXXXXXXXXX
code: XXXXXXXXXXXXXXXXXXX
redirect_uri: https://www.google.com/
resource: 00000003-0000-0ff1-ce00-000000000000%2Fhp.sharepoint.com%40xxxxxxxxxxxxx

这是我得到的错误。

{
"error": "invalid_grant",
"error_description": "AADSTS7000015: Provided grant is invalid or malformed.\r\nTrace ID: fd7f7f6c-436b-49ae-ae3d-5bd79f513e01\r\nCorrelation ID: ef5f0448-3352-477e-bfdc-44453febeaad\r\nTimestamp: 2019-02-13 07:34:38Z",
"error_codes": [
    7000015
],
"timestamp": "2019-02-13 07:34:38Z",
"trace_id": "fd7f7f6c-436b-49ae-ae3d-5bd79f513e01",
"correlation_id": "ef5f0448-3352-477e-bfdc-44453febeaad"
}