dbext without a password

How can I use dbext.vim without a MySQL password? I've tried using

let g:dbext_default_profile_mySQL = 'type=MYSQL:user=root:dbname=test'

and

let g:dbext_default_profile_mySQL = 'type=MYSQL:user=root:passwd=:dbname=test'

and

DBSetOption passwd=''

and clearing @afkb at the prompt when using \sbp. It always gives

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

I could set 'user' and no 'password' in ~/.my.cnf, but that's not manageable.

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