in internal/proxy/proxy.go [409:415]
func ParseInstanceURI(inst string) (string, string, string, string, error) {
m := instURIRegex.FindSubmatch([]byte(inst))
if m == nil {
return "", "", "", "", fmt.Errorf("invalid instance name: %v", inst)
}
return string(m[1]), string(m[2]), string(m[3]), string(m[4]), nil
}