Information Disclosure: Identify the username of the user that has a position of 736373 through SQLi

I need help with the second question in the information discloser with a twist of sqli: "Identify the username of the user that has a position of 736373 through SQLi. Submit it as your answer. "

I just finished the SQL Injection Fundamentals and I have no idea where to go. I’m not sure how to find the password of the admin to get into the databases. I’m completely lost can anyone give a nudging hint?