Merge branch 'vahidvdn-vahidvdn/microservices-client-register-async-docs'

Author: kamilmysliwiec

content/microservices/basics.md

@@ -235,20 +235,41 @@ One technique is to import the `ClientsModule`, which exposes the static `regist
 
 The `name` property serves as an **injection token** that can be used to inject an instance of a `ClientProxy` where needed. The value of the `name` property, as an injection token, can be an arbitrary string or JavaScript symbol, as described [here](https://docs.nestjs.com/fundamentals/custom-providers#non-class-based-provider-tokens).
 
-The `options` property is an object with the same properties we saw in the `createMicroservice()` method earlier.
+The `options` property is an object that contains the same properties we saw in the `createMicroservice()` method earlier.
 
 ```typescript
 @Module({
   imports: [
     ClientsModule.register([
       { name: 'MATH_SERVICE', transport: Transport.TCP },
     ]),
-  ]
-  ...
+  ],
+})
+```
+
+Alternatively, you can use the `registerAsync()` method if you need to pass in configuration or perform any other asynchronous processes.
+
+```typescript
+@Module({
+  imports: [
+    ClientsModule.registerAsync([
+      {
+        imports: [ConfigModule],
+        name: 'MATH_SERVICE',
+        useFactory: async (configService: ConfigService) => ({
+          transport: Transport.TCP,
+          options: {
+            url: configService.get('URL'),
+          },
+        }),
+        inject: [ConfigService],
+      },
+    ]),
+  ],
 })
 ```
 
-Once the module has been imported, we can inject an instance of the `ClientProxy` configured as specified via the `'MATH_SERVICE'` transporter options shown above, using the `@Inject()` decorator.
+Once the module has been imported, you can inject an instance of the `ClientProxy` configured with the specified options for the `'MATH_SERVICE'` transporter using the `@Inject()` decorator.
 
 ```typescript
 constructor(