嘗試示例項目：https://github.com/docusign/eg-01-java-jwt出現(xiàn)以下錯誤：Fetching an access token via JWT grant...Exception in thread "main" com.docusign.esign.client.ApiException: Error while requesting an access token: POST https://account-d.docusign.com/oauth/token returned a response status of 400 Bad Request    at com.docusign.esign.client.ApiClient.requestJWTUserToken(ApiClient.java:740)我猜我在組裝 JWT 請求時錯過了一些東西：    String privateKey = DSConfig.PRIVATE_KEY.replace("\\n", "\n");    byte[] privateKeyBytes = privateKey.getBytes();    apiClient.setOAuthBasePath(DSConfig.DS_AUTH_SERVER);    OAuth.OAuthToken oAuthToken = apiClient.requestJWTUserToken(        DSConfig.CLIENT_ID,        DSConfig.IMPERSONATED_USER_GUID,        scopes,        privateKeyBytes,        TOKEN_EXPIRATION_IN_SECONDS);配置屬性：# Integrator Key  (client id) issDS_CLIENT_ID=4dcfdaa1-xxxx-xxxx-xxxx-110bf207310f# API username Guid subDS_IMPERSONATED_USER_GUID=5aff04e4-xxxx-xxxx-xxxx-7ac9eefdac1a# private key stringDS_PRIVATE_KEY=\n\-----BEGIN RSA PRIVATE KEY-----\n\MIIEowIBAAKCAQEAgb2XJwtQ3S8henWphAtUcAChdDl1yYzHllytR4DZMY5hqp6E\n\8A2kxblecKHSa4OMn5fP2liyWOCNNA7Vactj0/zI60yUdeOtRg4GyjjG/ShPc80F\n\...sJn5DNlHlwpQjsxyVpxrkGNIRzhTUxdBGZ4VZrh5QM77z9kSX9uKkZ7oZQWv7IcJ\n\hO80HJ6v12HvTqypoqqOvVPKC1SK61cwdWdKi1GExcPqbrFoAJkB\n\-----END RSA PRIVATE KEY-----我得到的唯一錯誤是：Exception in thread "main" com.docusign.esign.client.ApiException: Error while requesting an access token: POST https://account-d.docusign.com/oauth/token returned a response status of 400 Bad Request想知道為什么它在 400 時失敗，并且沒有其他信息可以用來弄清楚為什么我得到 400。我打賭你們可能知道為什么會發(fā)生這種情況。提前致謝。