curl --request POST \
  --url https://api.example.com/api/v2/integrations/candid/connection/upsert \
  --header 'Content-Type: application/json' \
  --data '
{
  "connectionId": "<string>",
  "clientId": "<string>",
  "clientSecret": "<string>",
  "isStagingConnection": true
}
'

{
  "connectionId": "<string>"
}