# Sign-in required

`UNAUTHORIZED` · HTTP 401

## What it means

The path answers only to someone signed in to the Fentlig app. It is not part of the published API, and an API key does not open it.

## What to do

Use the operations in the API reference. Each of them answers to an API key.

```json
{
  "type": "https://fentlig.se/developers/errors/unauthorized",
  "title": "Sign-in required",
  "status": 401,
  "code": "UNAUTHORIZED"
}
```