configuring both username and secret on a CISCO router–is it doable?

I want to configure on CISCO a password that is encrypted as MD5.

I know I can simply use the command enable secret, but what if I want a username??

Somewhere I got the understanding (right or wrong) that the following command would also result in a secret password encrypted as MD 5 (as well as in a different plain text password)

Router (config)# username donawmesswme privilege 15 secret 0 PLAINTEXTPASSWORDHERE 5 MD5PASSWORDHERE

Is this understanding right or wrong???

(Sorry, I have some testing software but not at this time a CISCO router to play with–so there is no way I can just test this on my router)