It seems that local auth is impossible, all I found is to configure it against radius, user should check abills as billing system. (https://sourceforge.net/projects/abills/)
If anyone knows how to use local authentication like chap or pap or anything, let me know please. Otherwise IPoE seems a real nice option, not as robust as ppp, but quite nice.
IPoE module test connection:
Nov 26 18:35:19 accel accel-ipoe: ipoe0:eth2: recv [DHCPv4 Request xid=23249d54 chaddr=08:00:27:8d:38:56 <Message-Type Request> <Server-ID 10.1.1.250> <Request-IP 10.1.1.254> <Host-Name vyos> <Request-List Subnet,Broadcast,Router,DNS,Domain-Name,MTU>]
Nov 26 18:35:19 accel accel-ipoe: ipoe0:eth2: send [DHCPv4 Ack xid=23249d54 yiaddr=10.1.1.254 chaddr=08:00:27:8d:38:56 <Message-Type Ack> <Server-ID 10.1.1.250> <Lease-Time 300> <T1 150> <Router 10.1.1.250> <Subnet 255.255.255.255>]
Nov 26 18:35:19 accel accel-ipoe: ipoe0:eth2: ipoe: session started
Nov 26 18:35:22 accel ntpd[2013]: Listen normally on 9 ipoe0 10.1.1.250 UDP 123
Nov 26 18:35:22 accel ntpd[2013]: Listen normally on 10 ipoe0 fe80::a00:27ff:fe80:636d UDP 123
Nov 26 18:35:22 accel ntpd[2013]: peers refreshed