# `Monitorex.URLRedactor`

Redacts sensitive query parameters from URLs to prevent accidental leakage
of tokens, keys, and credentials in stored/displayed outbound URLs.

Sensitive param values are replaced with `[REDACTED]` before the URL is
written to storage.

# `redact`

```elixir
@spec redact(url :: String.t() | nil) :: String.t() | nil
```

Redacts sensitive query parameters from the given URL.

Uses the application config key `:sensitive_query_params` to determine
which parameters to redact (defaults to a built-in denylist).

## Examples

    iex> Monitorex.URLRedactor.redact("https://api.stripe.com/v1/charges?key=sk_live_xxx")
    "https://api.stripe.com/v1/charges?key=%5BREDACTED%5D"

    iex> Monitorex.URLRedactor.redact("https://api.example.com/users/123?page=1&per_page=20")
    "https://api.example.com/users/123?page=1&per_page=20"

    iex> Monitorex.URLRedactor.redact("https://api.example.com/health")
    "https://api.example.com/health"

    iex> Monitorex.URLRedactor.redact(nil)
    nil

    iex> Monitorex.URLRedactor.redact("")
    ""

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*Consult [api-reference.md](api-reference.md) for complete listing*