Mandatory to create Task for RL training

In IsaacLab I was wondering, seeing the examples in the GitHub, all Reinforcment Learning algorithms has the structure of:
./isaaclab.sh -p source/standalone/workflows/sb3/train.py --task Isaac-Cartpole-v0 --headless --cpu

Without having the template avaible at this GitHub that is inexisting,

I WAS WONDERING, IF I NEED TO CREATE A TASK IN ORDER TO MAKE A REINFORCMENT LEARNING ALGORITM.
If yes, do I do this form here?