src/Colorium/Stateful/Auth.php
public static function provider(ProviderInterface $provider = null)
    {
        if($provider) {
            static::$provider = $provider;
        }
        elseif(!static::$provider) {
            static::$provider = new Provider\Native(static::$root);
        }

        return static::$provider;
    }
public static function provider(ProviderInterface $provider = null)
    {
        if($provider) {
            static::$provider = $provider;
        }
        elseif(!static::$provider) {
            static::$provider = new Provider\Native(static::$root);
        }

        return static::$provider;
    }
Load session provider

@param ProviderInterface $provider
@return ProviderInterface