authentication module done

libs/common/src/guards/jwt.auth.guard.ts

@@ -0,0 +1,11 @@
+import { UnauthorizedException } from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
+
+export class JwtAuthGuard extends AuthGuard('jwt') {
+  handleRequest(err, user, info) {
+    if (err || !user) {
+      throw err || new UnauthorizedException();
+    }
+    return user;
+  }
+}