OAuth requires custom bean configuration to work with grpc

**The context**

What do you wish to achieve?

**Authentication and Authorization not working**

What's the problem? What's not working? What's missing and why do you need it?

**按照文档配置鉴权和授权都失效了。鉴权只有@Secured 能生效，手动管理 method 不生效。**

Do you have any relevant stacktraces or logs of your attempts?

**The application's environment**

Which versions do you use?
* Spring (boot): 2.2.5.RELEASE
* grpc-java: 5.2.4.RELEASE
* grpc-spring-boot-starter: 2.7.0.RELEASE
* java: version + architecture (64bit?) 11 + 64
* Other relevant libraries...

**Additional information**

* Did it ever work before?
no
* How can we reproduce it?
not sure
* Do you have a demo?
no