curl --request POST \
  --url https://api.txcloud.io/v1/identity/sessions/{id}/documents \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "side": "front",
  "image": "aSDinaTvuI8gbWludGxpZnk="
}
'

{
  "id": "sess_a1b2c3d4e5f6",
  "object": "identity.session",
  "status": "pending",
  "document_type": "<string>",
  "country": "<string>",
  "documents": [
    {
      "side": "<string>",
      "uploaded": true,
      "quality_score": 123
    }
  ],
  "selfie_uploaded": true,
  "expires_at": "2023-11-07T05:31:56Z",
  "created_at": "2023-11-07T05:31:56Z"
}