在Dialogflow NodeJS中捕获Auth错误

Question

我想捕获连接到Intent Client时输入错误的客户端电子邮件时连续输出的Auth错误。我想捕获此错误，以便告诉用户他们的电子邮件不正确。

我的代码：

const projectId = 'project123'

let config = {
    credentials: {
      private_key: privateKey,
      client_email: clientEmail
    }
  }

async function getIntentList(config,projectId){
    const intentClient = new dialogflow.IntentsClient(config);

        const projectAgentPath = intentClient.projectAgentPath(projectId);

        const request = {
            parent: projectAgentPath
        }
        const [response] = await intentClient.listIntents(request)


}
getIntentList(config,projectId)

输出错误：

Auth error:Error: invalid_grant: Not a valid email or user ID.
Auth error:Error: invalid_grant: Not a valid email or user ID.
Auth error:Error: invalid_grant: Not a valid email or user ID.
Auth error:Error: invalid_grant: Not a valid email or user ID.