.NET Core Microservices - Define cart service interface

The video tutorial explains how to add a new card service interface in the iservice folder. It covers defining methods such as 'get card by user ID', 'add to cart async', 'update card async', and 'remove from cart async'. The tutorial emphasizes the use of generics, async methods, and handling parameters like user ID and token. It also highlights the importance of setting default values for tokens and clarifies the use of cardeto objects and card ID integers.

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