Step To Reproduce: 1. Start program. 2. Use “admin add testingDoc ” Actual Results: The program prints out “Added Doctor to System” and crashes with an exception. Expected Results: The program should notify to use valid input, which is “admin add [username]:[password]”. Suggested Fix: We should handle the case where an invalid input format is used for admin commands. Print out "Invalid Input Format" without terminating the program.