DALLAS — Nick Saban has traded his straw hat, vest and whistle for a suit, pink tie and a microphone. Bye, bye Nick Saban, Alabama head football coach. Hello, Nick Saban, the newest member of the college football media. Much like Saban’s 7-6 debut as the head coach of the Tide way back in 2007, his first-year role as a media member got off to a bit of an inauspicious start Monday when he was turned away by security because he forgot his credential in his hotel room. “I’ve never worn a credential in my life,” Saban told ESPN’s Mike Greenberg on Get Up. “For 17 years, I was always able to get in…