Method: registrations.create

Creates a Registration, causing Classroom to start sending notifications from the provided feed to the destination provided in cloudPubSubTopic.

Returns the created Registration. Currently, this will be the same as the argument, but with server-assigned fields such as expiryTime and id filled in.

Note that any value specified for the expiryTime or id fields will be ignored.

While Classroom may validate the cloudPubSubTopic and return errors on a best effort basis, it is the caller's responsibility to ensure that it exists and that Classroom has permission to publish to it.

This method may return the following error codes:

• PERMISSION_DENIED if:
  • the authenticated user does not have permission to receive notifications from the requested field; or
  • the current user has not granted access to the current Cloud project with the appropriate scope for the requested feed. Note that domain-wide delegation of authority is not currently supported for this purpose. If the request has the appropriate scope, but no grant exists, a [Request Errors][@MissingGrant error] is returned.
  • another access error is encountered.
• INVALID_ARGUMENT if:
  • no cloudPubsubTopic is specified, or the specified cloudPubsubTopic is not valid; or
  • no feed is specified, or the specified feed is not valid.
• NOT_FOUND if:
  • the specified feed cannot be located, or the requesting user does not have permission to determine whether or not it exists; or
  • the specified cloudPubsubTopic cannot be located, or Classroom has not been granted permission to publish to it.