I can get the secret versions with
from google.cloud import secretmanager
secretmanager_client = secretmanager.SecretManagerServiceClient()
secret_pages = secretmanager_client.list_secret_versions(parent=f"projects/{project-number}/secrets/{secret-name}").pages
version = next(version for page in secret_pages for version in page.versions if version.state.value == 1)
data = secretmanager_client.access_secret_version(name=version.name).payload.data
But all this is very awkward to put in all my apps. Isn't there a better way?