func (c *Client) ListSubscriptions(ctx context.Context, collection string) ([]Subscription, error) {
url := fmt.Sprintf("https://api.fitbit.com/1/user/%s/%s/apiSubscriptions.json", c.fitbitUserID, collection)
res, err := c.client.Get(url)
func (c *Client) ListSubscriptions(ctx context.Context, collection string) ([]Subscription, error) {
url := fmt.Sprintf("https://api.fitbit.com/1/user/%s/%s/apiSubscriptions.json", c.fitbitUserID, collection)
res, err := c.client.Get(url)