curl --request POST \
  --url https://api.pocketflows.com/businesses/{id}/email_templates \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "subject": "<string>",
  "attachments": [
    {
      "content": "<string>",
      "name": "<string>"
    }
  ],
  "one_off": true,
  "metadata": {},
  "kind": "plaintext",
  "body": "<string>"
}'

{
  "id": "<string>",
  "name": "<string>",
  "subject": "<string>",
  "kind": "plaintext",
  "body": "<string>",
  "template_json": "<any>",
  "template_html": "<string>",
  "attachments": [
    {
      "content": "<string>",
      "name": "<string>"
    }
  ]
}