要在AWS Cognito注销时使令牌失效，您可以使用AWS SDK for JavaScript来实现。以下是一个示例代码，演示如何使用AWS Cognito SDK实现此功能：

const AWS = require('aws-sdk');
const AmazonCognitoIdentity = require('amazon-cognito-identity-js');

const userPoolId = 'YOUR_USER_POOL_ID';
const clientId = 'YOUR_APP_CLIENT_ID';
const region = 'YOUR_AWS_REGION';

AWS.config.update({
  region: region
});

const cognitoUser = createCognitoUser('USERNAME');

// 创建Cognito用户
function createCognitoUser(username) {
  const poolData = {
    UserPoolId: userPoolId,
    ClientId: clientId
  };
  const userPool = new AmazonCognitoIdentity.CognitoUserPool(poolData);
  const userData = {
    Username: username,
    Pool: userPool
  };
  return new AmazonCognitoIdentity.CognitoUser(userData);
}

// 注销并使令牌失效
function signOutAndInvalidateToken() {
  cognitoUser.getSession(function(err, session) {
    if (err) {
      console.log('Error getting user session:', err);
      return;
    }

    // 注销用户
    cognitoUser.signOut();

    // 使令牌失效
    const params = {
      AccessToken: session.getAccessToken().getJwtToken()
    };
    const cognitoIdentityServiceProvider = new AWS.CognitoIdentityServiceProvider();
    cognitoIdentityServiceProvider.globalSignOut(params, function(err, data) {
      if (err) {
        console.log('Error invalidating token:', err);
        return;
      }

      console.log('Token invalidated:', data);
    });
  });
}

// 调用函数进行注销和使令牌失效
signOutAndInvalidateToken();

请确保将YOUR_USER_POOL_ID，YOUR_APP_CLIENT_ID和YOUR_AWS_REGION替换为您自己的信息。