I think his point is he wants it for free and for anope to implement it.
Nothing wrong with that but /nick nick:password isn't a command normally recognized by the IRCd.. there is nothing in the RFC about the command or what the syntax would be to interact with services to my knowledge, nor do I know of an IRCd that supports it by default.. How can anope implement & support something the IRCds don't..
The first step towards such a command would be an open implementation in the IRCd and the documented protocol it uses to interact with services, only then can anope implement it..
I can see this being very handy in combination with NS SET KILL IMMED, but like I said, it s the IRCd that needs to parse /nick nick:password first..