Apollo IntrospectAndCompose cannot read property 'source'

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Hello Apollo Community,

I am trying to run apollo federation in k8s locally. Initially i was using supergraphSdl which was just a string of all my graphql queries and mutations. I decided to switch to IntrospectAndCompose as recommended by the apollo team, but i get this error

Error: Couldn't load service definitions for \"users-service\" at http://users_service:3005/graphql: Cannot read property 'source' of undefined"

I have confirmed that Introspection is set to true in my users subgraph, and it is running fine locally, What could I be doing wrong? Here is an example of my setup

// gateway setup

if (!apolloKey) {
	gatewayOptions.supergraphSdl = new IntrospectAndCompose({
		subgraphs: [
			{ name: "users-service", url: "http://users_service:3005/graphql" },
			{ name: "news-service", url: "http://news_service:3011/graphql" },
			{
				name: "notification-service",
				url: "http://notifications_service:3012/graphql",
			},
		],
	})
}
gatewayOptions.buildService = ({ url }) => {
	return new AuthenticatedDataSource({ url })
}
const gateway = new ApolloGateway(gatewayOptions)

And my users subgraph has this

	const server = new ApolloServer({
		context,
		schema,
		plugins: [ApolloServerPluginDrainHttpServer({ httpServer }), newrelicPlugin].filter(Boolean),
		introspection: process.env.NODE_ENV === 'development' ? true : false,
		formatError: (error) => {
			if (error.originalError instanceof ApolloError) {
				return error;
			}
			const errId = uuidv4();
			console.log(error);
			logger.error(`${errId} ${error.message}`);
			if (Constants.IS_DEV) {
				logger.error(error);
				return {
					message: error.message,
				};
			}
			return new GraphQLError(`Internal error: ${errId}`);
		},
	});

Any help is appreciated. Thank you!