Authentication is one of the core parts of ensuring security in applications. But applying right authentication techniques often becomes difficult for the developers. Specially in Symfony, which requires a bit of technical knowledge for executing such tasks. So, this article demonstrates in detail how to apply Symfony authentication via token based procedure. Specifically explains, how you could create token based API authentication in the framework. It is a briefly written article for those developers who want to learn how to work with Guard and user authentication via API tokens.