How am i able to get in club masquerade?

Im going to my first concert in Atlanta at the masquerade with me (12 years old) and my 13 year old cousin. When we buy tickets, since its a club do we have to have an adult over 18 to buy a ticket too. Or me and my cousin can go with like our guardian waiting outside??? Please let me know thanks alot :). P.S. WE'RE GOING FOR MINDLESS BEHAVIOR, TYGA, DEVUNTE, AND JAWAN