Add microservice middleware

src/app.module.ts

-import { Module } from '@nestjs/common';
+import { Module, MiddlewareConsumer, RequestMethod } from '@nestjs/common';
 import { EmailModule } from './email/email.module';
 import { ConfigModule } from './configuration/config.module';
+import { microserviceMiddleware } from './middlewares/microservice.middleware';
 
 @Module({
   imports: [ConfigModule, EmailModule],
   controllers: [],
   providers: [],
 })
-export class AppModule {}
+export class AppModule {
+  configure(consumer: MiddlewareConsumer) {
+    // Applying the middleware that takes the Authorization header jwt payload and put it in the request headers
+    consumer
+      .apply(microserviceMiddleware).forRoutes(
+        { path: 'email/send', method: RequestMethod.POST },
+      );
+  }
+}

src/middlewares/microservice.middleware.ts

+import { Logger, ForbiddenException } from '@nestjs/common';
+
+export function microserviceMiddleware(req, res, next) {
+  Logger.log('[-] Untokenise middleware called');
+  if (req.headers['x-consumer-groups']) {
+    const arr = req.headers['x-consumer-groups'].split(',');
+    arr.map(e => e.trim());
+    const group = arr.find(e => e === 'microservice');
+    if (group === undefined) {
+      throw new ForbiddenException('You can\'t access this ressource.');
+    } else {
+      next();
+    }
+  } else {
+    throw new ForbiddenException('You can\'t access this ressource.');
+  }
+}
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