curl -X POST \
  -H "X-API-Key: $PARTICLE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}' \
  "https://api.particle.pro/v1/projects/{projectId}/slack/connections/initiate"

{
  "authorize_url": "<string>"
}

{
  "detail": "<string>",
  "error_code": "<string>",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "<string>",
  "resolve": {
    "message": "<string>",
    "action": "<string>",
    "endpoint": "<string>",
    "method": "<string>",
    "url": "<string>"
  },
  "status": 123,
  "title": "<string>",
  "type": "about:blank"
}