working configuration file for your dyndns setting in ubiquiti dream machine e.g.

inadyn.conf

#
# Generated automatically by ubios-udapi-server
#
iface = ppp0
provider spdyn.de {
    hostname = "your-hostname"
    username = "your-email" # the same as your web login
    password = "your-password" # the same as your web login, no update-token
    checkip-server = "checkip.spdyn.de"
    checkip-path = "/"
    checkip-ssl = false
}