Hello i have one project to do in laravel 10,I need to develop web apps,But i’m not clearly understand binary tree or recursive tree.I am need explanation so hard to find because data of user already exist the problem refferl code use like sponsor id to find who is paying and who owner refferal code.Can show me how can i make 7 level system each user limit 7 level and each level have limit how many user will become child and go to child in same time master refferal and upline will get commision and commision will save in seperate DB