I am new to this concrete5 system, and i am pretty much getting freaked out by this. I dont know how to add code to the page plus i have to make my own login system as soon as possible. So please guys could you help me ? Can i create my own login system where other people can register on my website make their profile and can login ?

P.S: I cannot access any files all i can do is edit the website online. For the project which i have to do, I can only see the online interface, same as the instant setup. No files, No codes nothing.