要使用aws-sdk V3和CognitoIdentityServiceProvider，首先需要在项目中安装aws-sdk V3和CognitoIdentityServiceProvider包。

安装aws-sdk V3：

npm install aws-sdk

接下来，您可以使用以下代码示例来使用CognitoIdentityServiceProvider：

const { CognitoIdentityServiceProvider } = require("aws-sdk");

// 配置AWS
const AWS = require("aws-sdk");
AWS.config.update({region: 'your-region'});

// 创建CognitoIdentityServiceProvider实例
const cognitoIdentityServiceProvider = new CognitoIdentityServiceProvider();

// 创建用户
const createUser = async (username, password) => {
  const params = {
    UserPoolId: 'your-user-pool-id',
    Username: username,
    TemporaryPassword: password,
    MessageAction: 'SUPPRESS',
    UserAttributes: [
      {
        Name: 'email',
        Value: 'user@example.com'
      },
      {
        Name: 'phone_number',
        Value: '+1234567890'
      }
    ]
  };

  try {
    const response = await cognitoIdentityServiceProvider.adminCreateUser(params).promise();
    console.log('User created successfully:', response);
  } catch (error) {
    console.error('Error creating user:', error);
  }
};

// 身份验证
const authenticateUser = async (username, password) => {
  const params = {
    AuthFlow: 'ADMIN_NO_SRP_AUTH',
    ClientId: 'your-app-client-id',
    UserPoolId: 'your-user-pool-id',
    AuthParameters: {
      USERNAME: username,
      PASSWORD: password
    }
  };

  try {
    const response = await cognitoIdentityServiceProvider.adminInitiateAuth(params).promise();
    console.log('Authentication successful:', response);
  } catch (error) {
    console.error('Error authenticating user:', error);
  }
};

// 更新用户密码
const updateUserPassword = async (username, newPassword) => {
  const params = {
    UserPoolId: 'your-user-pool-id',
    Username: username,
    Password: newPassword
  };

  try {
    const response = await cognitoIdentityServiceProvider.adminSetUserPassword(params).promise();
    console.log('Password updated successfully:', response);
  } catch (error) {
    console.error('Error updating password:', error);
  }
};

// 删除用户
const deleteUser = async (username) => {
  const params = {
    UserPoolId: 'your-user-pool-id',
    Username: username
  };

  try {
    const response = await cognitoIdentityServiceProvider.adminDeleteUser(params).promise();
    console.log('User deleted successfully:', response);
  } catch (error) {
    console.error('Error deleting user:', error);
  }
};

// 调用函数示例
createUser('testuser', 'password123');
authenticateUser('testuser', 'password123');
updateUserPassword('testuser', 'newpassword123');
deleteUser('testuser');

在上面的代码示例中，您可以根据自己的需求修改参数和函数调用。确保替换示例中的"your-region"、"your-user-pool-id"和"your-app-client-id"等值为您自己的配置信息。

这是一个基本示例，您可以根据CognitoIdentityServiceProvider提供的其他方法和功能进行扩展。