$connect_parameter = {
    attributes => {
        mysql_enable_utf8 => 1,
    },
    login_mode => { # ask   use environment variable   don't ask
        host => 2,  # 0     1                          2
        port => 2,  # 0     1                          2
        user => 1,  # 0     1                          2
        pass => 1,  # 0     1                          2
    },
    credential => {
        host => undef,
        port => undef,
        user => "my_name",
        pass => undef,
    },
    keep_secret = {
        host => 0,
        port => 0,
        user => 0,
        pass => 1,
    },
};