This topic describes authentication information for Pub/Sub.
Supported authentication methods
Pub/Sub supports the following authentication methods.
Service accounts are recommended for almost all use cases, whether you are developing locally or in a production application. For an example of how to set up authentication with a service account, see Pub/Sub client libraries.
For more information about setting up authentication with a production application, see Setting up authentication for server to server production applications.
When an application calls a Google Cloud API, IAM checks that the caller has an identity with the permissions required to use the resource.
For example, user and service accounts are identities. To make permissions available to a user or service account, grant it at least one IAM role. A role contains a set of permissions that allows you to perform specific actions on Google Cloud resources.
For more information about the roles for Pub/Sub, see Pub/Sub access control.