Explore the process of enhancing the Gatsby Swag Store serverless GraphQL API with mutations in this comprehensive video tutorial. Learn how to create customers in Shopify, save customer data in Prisma, and identify available discount codes. Follow along as Amberley Romo and Jason Lengstorf guide you through various topics, including customer creation, data modeling, error handling, and testing. Discover how to work with Prisma logs, utilize the GitHub API, and implement GraphQL queries for customer data. Gain valuable insights into serverless API development and GraphQL implementation for e-commerce applications.