How do you integrate Angular or React with microservices? Best practices for communication, authentication, and state management? Thanks! - Shahjahan

I am currently working on a project that involves integrating a modern front-end framework (like Angular or React) with a microservice architecture. What are some best practices and tools you recommend for ensuring smooth communication between the front-end and various microservices? Also, how do you handle authentication and state management in such setups?