Authentication and WebSocket token provider for Kraken API

This crate provides authentication utilities for Kraken's WebSocket APIs. The primary use case is obtaining WebSocket tokens for private channel subscriptions.

Example

use kraken_auth::{Credentials, TokenProvider};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Load credentials from environment
    let creds = Credentials::from_env()?;

    // Create token provider
    let provider = TokenProvider::new(creds);

    // Get WebSocket token for private channels
    let token = provider.get_ws_token().await?;
    println!("Token: {}", token.token);

    Ok(())
}