(Hi - I am the programmer behind @resteembot.)
Open userData.json with a text editor (notepad).
Then edit it to write your info.
The program will read that file and log in with the data you wrote.
I am sorry that the information wasn't clear enough. It's been a while since I had to explain stuff to non-programmers.
I will add more information (for other users) later.
Ok, I think this is not for me!
Yep. Seems that way. Thank you anyway for the effort.
I was really happy that someone else believed in the bot as well.