Authentication systems must inherently scale to support a growing number of users and requests without degradation. A tightly coupled or centralized authentication service can quickly become a performance bottleneck as user traffic increases, hindering overall system scalability. To mitigate this, modern architectures often employ stateless authentication mechanisms like JSON Web Tokens (JWTs) or distribute authentication responsibilities across multiple services. This approach allows for horizontal scaling of application servers, as each server can independently verify user credentials without needing to frequently query a central authentication database for every request. Efficient authentication, therefore, directly enables a system's capacity to handle higher transaction volumes and maintain responsiveness under load, making it a critical consideration for scalable designs. More details: https://myokan.okan.jp/shop/display_cart?return_url=https://epi-us.com/