After install the img copy of 16.04 for rasp3 i get a message of login and password during the first set up

I have downloaded the version 16,04 for rasp3.

I made a img file and with win34 copy into a SD crda.

THen enter the card in my raps3 and connected the supply.

The operating system executes itself fun until it display two messages:

1º) “ubuntu login:”
2º) “pasword:”

I do not know whicha re the loginh and pasword of one operative system as such. I have never established.

The ubunto 16.04 version was downloaded from the offical ubuntu mate web.

I nee IRGENT HELP PLEASE!!!..