Web API Development with Flask (Video 19)

This video tutorial covers token-based authentication for web applications and APIs. It explains the importance of tokens, their characteristics, and how to implement them without using additional extensions. The tutorial includes practical steps for setting up token authentication in Flask, testing with Postman, and ensuring security. The video concludes with a preview of the next topic, which is the usage of cookies in Flask applications.

Describe the process of sending a token back to a client after successful authentication.

What happens if a request does not include a valid token in the HTTP headers?