Does Anyone Here Work For Airport Security?

I applied for a security position with TSA @ Newark Airport a few months ago & today I get a(n) email telling me that I ped initial eligibility requirements & now I have to go take a 2 1/2 hour computerized test, & after that there are some other things that I'm going to have to do & one of them is a Credit Check. My Score isn't good at all(504), when I was younger I went nuts with my credit cards & I'm still paying off some of them. Now I don't want to waste my time or the companies time take the test for a job I mite not get cause of my credit score. So Should I just go take the test & see what happens or should I just call them & cancel & let them find someone else?