How rasa x train model, How its work?

Hello from thailand. I want to know how rasa x train the model and can we call the file, example NLU.yml on rest api then we call it to train our model. Thank you

I don’t know if I understand well enough the question, but on the left menu in rasa x GUI you can upload your yml files and train the model too. You can also connect directly your github repository to rasa x si you don’t need either to upload the files.