func NewID(prefix string) string {
	return prefix + uuidEncoder.Encode(uuid.New())
}
NewID Generates a guaranteed-unique identifier which is a total of
37 characters long, having the given single-character prefix.
package lib
import (
	"fmt"
	"math"
	"math/big"
	"sort"
	"strings"
	"github.com/google/uuid"
)
const (
	prefixUser   = "@"
	prefixClient = "$"
)