Can Sentinel be used for internal authentication of microservices?

## Issue Description

Type: *bug report* or *feature request*

### Describe what happened (or what feature you want)
Use Sentinel to implement internal authentication of microservices

### Describe what you expected to happen
Enable more secure calls between microservices

### How to reproduce it (as minimally and precisely as possible)

I hope it can be flexibly applied to calls between microservices

### Tell us your environment
At the current planning stage, it is finally expected to be applied to the production environment

### Anything else we need to know?
There is nothing for the time being