curl --request POST \
  --url https://api.example.com/poolside/v1/teams/{team_id}/members/add \
  --header 'Content-Type: application/json' \
  --data '
{
  "user_ids": [
    "<string>"
  ]
}
'

{
  "added": 123,
  "removed": 123,
  "$schema": "<string>"
}