Which AWS service can the company use to make this integration?

Explanations:

AWS Directory Service is primarily used for integrating AWS resources with Microsoft Active Directory or for managing directories, not specifically for social media login integration.

AWS Identity and Access Management (IAM) is designed for managing AWS service permissions and user access, not for handling social media logins or federated identities.

Amazon Cognito provides user authentication, including support for social identity providers (like Facebook, Google, etc.), making it ideal for integrating social media login credentials.

AWS IAM Identity Center (AWS Single Sign-On) is focused on managing access to AWS accounts and applications, and is not tailored for integrating social media logins for online applications.