`Users.getUserOauthAccessToken` return signature changed

The response payload of Users.getUserOauthAccessToken was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the backend API returns directly.

Here's an example of how the response shape would change with this modification:

- const data = await clerkClient.users.getUserOauthAccessToken()
+ const { data, totalCount } = await clerkClient.users.getUserOauthAccessToken()