我遵循教程https://github.com/rapidwebltd/php-google-contacts-v3-api。
只需运行composer require rapidwebltd/php-google-contacts-v3-api，但会出现错误：
Using version ^2.0 for rapidwebltd/php-google-contacts-v3-api
./composer.json has been updated
Root package 'rapidwebltd/php-google-contacts-v3-api' cannot require itself in its composer.json
Did you accidentally name your root package after an external package?
这不起作用吗？