400 bad request when trying to `updateSubscription`

[developeratul]

When I am trying to update a subscription in this way,

await client.updateSubscription({
  id: user.subscriptionId,
  variantId: `${user.variantId}`,
  productId: process.env.LEMONS_SQUEEZY_PRODUCT_ID as string,
  cancelled: true,
});

I am getting 400 bad request as a response. The client is set up properly using valid API keys and is certain that all the values being used in the object are also valid.

What is causing this issue? and let me know if it requires more information and context.

Pardon my mistakes. I am writing an actual GitHub issue for the first time ;)

[Parth971]

Please send response whenever writing for errors.

[developeratul]

The response only contains a status code of 400 and a message of Bad request. Nothing else.