# `TOKEN_USED` Link already used

Source: https://checkslip.com/en/problems/token-used

- **HTTP status**: `401`
- **Credit**: No credit taken

## Meaning

E-mail links work once, and this one has been used.

## Fix

If you already finished, sign in. Otherwise ask for a new e-mail.

## Example response

```
{
  "type": "https://checkslip.com/problems/token-used",
  "title": "Link already used",
  "status": 401,
  "code": "TOKEN_USED",
  "instance": "019a2f3e-7b1c-7d4e-9f00-0a1b2c3d4e5f"
}
```