}

	tc := azblob.NewTokenCredential(spt.Token().AccessToken, func(tc azblob.TokenCredential) time.Duration {
		err := spt.Refresh()
		if err != nil {
			return 0
		}
		// set the new token value
		tc.SetToken(spt.Token().AccessToken)

		// get the next token before the current one expires
		nextRenewal := float64(time.Until(spt.Token().Expires())) * 0.8
		if nextRenewal <= 0 {
			nextRenewal = float64(time.Second)
		}