Primary member - your username is your member number
Member numbers are either six or seven digits. If the primary member is 1234, it appears as 001234. The spouse is 1234-A (six digits or spaces). However if the primary member is 12345, it appears as 012345 and the spouse is 12345-A (seven digits or spaces).
Your last name. (First letter is capitalized, all other letters are lower case)
After logging in, you will be prompted to change your password to something more secure. You will also have the option to change your username.