Assuming you can connect using the mysql command line client with a password
mysql -u myusername -h 127.0.0.1 -p
then these are the Og parameters:
Og.options = { # :destroy => true, :store => :mysql, ## database name # :name => 'mydatabase', ## integer, not string # :port => 3306, :user => 'myusername', :address => '127.0.0.1', :password => 'mypassword' }
Trivial, but timesaving for a newbie.