curl --request GET \
  --url {schemes}://api.upsun.com/users/{user_id}/connections/{provider} \
  --header 'Authorization: Bearer <token>'

{
  "provider": "<string>",
  "provider_type": "<string>",
  "is_mandatory": true,
  "subject": "<string>",
  "email_address": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}