Macro require_credentials 

macro_rules! require_credentials {
    ($config:expr, $exchange:ident) => { ... };
    ($exchange:ident) => { ... };
}

Requires exchange credentials to run a test.

Skips the test if credentials are not available for the specified exchange.

Examples

// Version 1: With explicit config
require_credentials!(config, binance);

// Version 2: Simplified version with auto-loading
require_credentials!(binance);