code: func retryParams() retry.Iterator {
  	return &retry.ExponentialBackoff{
  		Limited: retry.Limited{
  			Delay:    50 * time.Millisecond,
  			Retries:  50,
  			MaxTotal: 5 * time.Second,
  		},
  		Multiplier: 2,
  	}
  }
docs: // retryParams defines retry strategy for handling transient errors when minting
  // or refreshing tokens.