maybe can check in your router or email that they sent to you.

yes it is in the registration form they sent via email

I changed the password for accessing the router, hit reboot, now it won't bloody connect (the router won't connect to the net)

in the logs it keeps on saying
PAP authentication failed

and the date on the router has been reset to Jan 1,2000 (does not make any sense)

called Unifi, lady said she will reset, instantly, it began to work again

hope this helps others with similar errors, but generally that error means that the username / password combination is incorrect, but in my case it was correct