What is the ammount of current when using no resistors
In theory if it was an ideal power supply without internal resistance, and wires would not have resistance, you would have infinite current flowing, which is actually not possible as there is no resistance so there would also be no voltage drop so it's a very undefined situation.
However, if you look at V=I*R from another angle, having zero resistance means that there is no voltage drop anywhere, regardless of what the current is, which might make more sense.
In practice, wires have resistance, but the battery has even larger internal resistance due to it's chemistry and structure. It is not likely to get more than few hundred milliamperes of short circuit current out of a 9V battery.
OK, I was wrong, I shorted a 9V battery with a multimeter in 10A range, and got a short circuit current of approximately 2.5A. The open circuit voltage of the battey was 9.15V.