people (v1) PREREQUISITE: Read for auth, global flags, and security rules. If missing, run to create it. API Resources contactGroups - — Get a list of contact groups owned by the authenticated user by specifying a list of contact group resource names. - — Create a new contact group owned by the authenticated user. Created contact group names must be unique to the users contact groups. Attempting to create a group with a duplicate name will return a HTTP 409 error. Mutate requests for the same user should be sent sequentially to avoid increased latency and failures. - — Delete an existing cont…