curl --request POST \
  --url https://api.example.com/api/integrations/my-credentials \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "token": "<string>",
  "username": "<string>",
  "key": "<string>"
}
'

{
  "id": "<string>",
  "provider": "<string>",
  "masked_secret": "<string>",
  "username": "<string>",
  "created_at": "<string>"
}