New Ably tutorials on presence and client/server authentication

Ably has added three new tutorials for users to learn about popular features such as Presence and Client & Server Token Authentication. The Presence feature allows clients to be aware of other active members on a channel, enabling real-time tracking across devices. This can be useful in developing applications like chat rooms and multiplayer games. Ably supports two types of authentication schemes: Basic and Token. While most tutorials demonstrate the use of Basic Authentication, this new tutorial focuses on using the recommended Token Authentication scheme for untrusted clients.