Nevermind I figured it out. I SSHd into the CMC, then used the connect switch-1 command. I provided the enable password and was then able to use the username command to setup an admin user. 
Hello, I upgraded the firmware on my M6348 switch following the "Upgrading PowerConnect Switches from Version 2.x.x.x or 3.x.x.x or 4.x.x.x or 5.x.x.x to 5.1.10.1 Firmware" guide. However after it rebooted I am no longer able to log into the switch with any combination of username and passwords. I attempted to log in via telnet and that did not work either. I followed the directions exactly.  I am hoping to avoid needing to log into the console as I am 700 miles away from the switch.  Please advise. Thanks!
M6348 Firmware password