# Leaderboard API Endpoint

## GET `/api/leaderboard`

Returns the highest test data from each user as a JSON array. The data includes metrics such as username, words per minute (WPM), accuracy percentage, the time taken for the test, and the length of the test for a comprehensive overview of user performance.

## Responses

- `200 OK`: Successfully retrieves the leaderboard data.
- `404 Not Found`: Indicates that the leaderboard was not found.
- `500 Internal Server Error`: Indicates an issue with accessing the database.

## Example Response

```json
[
  {
    "username": "user1",
    "wpm": 75,
    "accuracy": 97,
    "test_time": 120,
    "test_length": 250
  },
  {
    "username": "user2",
    "wpm": 73,
    "accuracy": 95,
    "test_time": 115,
    "test_length": 240
  }
]
```

## Fields

- `username`: The name of the user.
- `wpm`: Words per minute, indicating the typing speed.
- `accuracy`: The accuracy of the user's typing, in percentage.
- `test_time`: The total time taken to complete the test, in seconds.
- `test_length`: The length of the test, typically measured in number of words.