add: add new code related to authentication

- right now the code is commented, but we can use that in future

Author: SDE-Arun

src/auth/guards/auth.guard.ts

@@ -8,3 +8,38 @@ export class JwtAuthGuard extends AuthGuard('jwt') implements CanActivate {
     return super.canActivate(context);
   }
 }
+
+// import { CanActivate, ExecutionContext, Injectable, UnauthorizedException } from '@nestjs/common';
+// import { JwtService } from '@nestjs/jwt';
+// import { Request } from 'express';
+
+// @Injectable()
+// export class AuthGuard implements CanActivate {
+//   constructor(private jwtService: JwtService) {}
+
+//   async canActivate(context: ExecutionContext): Promise<boolean> {
+//     const request = context.switchToHttp().getRequest();
+
+//     const token = this.extractTokenFromHeader(request);
+//     if (!token) {
+//       throw new UnauthorizedException();
+//     }
+
+//     request['user'] = await this.verifyToken(token);
+//     return true;
+//   }
+
+//   private extractTokenFromHeader(request: Request): string | undefined {
+//     const [type, token] = request.headers.authorization?.split(' ') ?? [];
+//     return type === 'Bearer' ? token : undefined;
+//   }
+
+//   private async verifyToken(token: string): Promise<{ id: string }> {
+//     try {
+//       const payload = await this.jwtService.verifyAsync(token);
+//       return { id: payload.sub };
+//     } catch {
+//       throw new UnauthorizedException();
+//     }
+//   }
+// }

src/prisma-connection/prisma-connection.module.ts

@@ -9,3 +9,17 @@ import { PrismaConnectionService } from './prisma-connection.service';
   exports: [PrismaConnectionService],
 })
 export class PrismaConnectionModule {}
+
+//! Below part is used when we have error this
+//? ==>> some worker can't close properly and force exited and exit gracefully. This is likely caused by tests leaking due to improper teardown.
+//! and the above thing can be happen anywhere
+// export class PrismaConnectionModule implements OnApplicationShutdown {
+//   constructor(
+//     @Inject('')
+//     private readonly prismaClient: PrismaClient
+//   ) {}
+
+//   onApplicationShutdown() {
+//     this.prismaClient.$disconnect();
+//   }
+// }