I guess that once it id comletely develop you would provide some guide in order to know how to interface with a private account server too right?
Then that means too that for now if I want to use the TTN backed for a private network, I have to register my nodes into the TTN devices server otherwise I won't see any traffic from my nodes since if they are not register, the broker wouldn't allow them have access to the network, am I right?
I did it once, and now I don get the starting error in the broker, 
, thanks @johan