FEAT: Connection test creating connection

- If any error occurs, connection is deleted
 - If operation_result is false, connection is deleted

src/error/grpc-to-http-exception.filter.ts

@@ -1,16 +1,32 @@
-import { ExceptionFilter, Catch, ArgumentsHost } from '@nestjs/common';
+import {
+  ExceptionFilter,
+  Catch,
+  ArgumentsHost,
+  HttpException,
+  HttpStatus,
+} from '@nestjs/common';
 import { Response } from 'express';
 
 import ErrorBuilder from '../utils/ErrorBuilder';
 
+/**
+ * ExceptionFilter to handle RpcException thrown by our microservices
+ *
+ * If it detects that the exception is already an **HttpException** or it is generated by our **ErrorBuilder**,
+ * it will return the exception without any treatment.
+ */
 @Catch(Error)
 export class GrpcToHttpExceptionFilter implements ExceptionFilter {
   catch(exception: any, host: ArgumentsHost) {
     const ctx = host.switchToHttp();
     const response = ctx.getResponse<Response>();
 
-    // return this exception directly if is already of type ErrorBuilder,
-    // else transform it using the ErrorBuilder
+    if (exception instanceof HttpException) {
+      return response
+        .status(exception.getStatus())
+        .json(exception.getResponse());
+    }
+
     const err =
       exception.constructor.name === ErrorBuilder.name
         ? exception