in authenticating-users/main.py [0:0]
def audience():
"""Returns the audience value (the JWT 'aud' property) for the current
running instance. Since this involves a metadata lookup, the result is
cached when first requested for faster future responses.
"""
global AUDIENCE
if AUDIENCE is None:
project_number = get_metadata('numeric-project-id')
project_id = get_metadata('project-id')
AUDIENCE = '/projects/{}/apps/{}'.format(
project_number, project_id
)
return AUDIENCE