VintageNetMobile configuration - private APN

Hi,

I have a requirement to configure my Nerves based device with VintageNetMobile.Modem.QuectelEC25 to a private APN for which I need to add to my configuration in addition to APN also username and password.

Somehow I can’t really find any docs about this. Has anyone done this already and if yes, how?

My current working setup is

    {"ppp0",
     %{
       type: VintageNetMobile,
       vintage_net_mobile: %{
         modem: VintageNetMobile.Modem.QuectelEC25,
         #  service_providers: [%{apn: "ibox.tim.it"}] # for ITALIAN sims
         # for HOT sims
         service_providers: [%{apn: "<MY APN STRING>"}]
       }
     }}

So, need to add username and password to this.

Tomaz