Generating user table with Acts_as_authenticated

Sorry for the newbie question. I’d like to check out the
Acts_as_authenticated plugin but have no idea how to conveniently set up
the
User Table in Mysql.

I use a mac OSX, but how do I change the following code into a DB
schema?

def self.up
create_table “add_authenticated_tables”, :force => true do |t|
t.column “login”, :string, :limit => 40
t.column “email”, :string, :limit => 100
t.column “crypted_password”, :string, :limit => 40
t.column “salt”, :string, :limit => 40
t.column “activation_code”, :string, :limit => 40 # only if you
want
t.column “activated_at”, :datetime # user
activation
t.column “created_at”, :datetime
t.column “updated_at”, :datetime
end
end