function get_value( value_name )
  -- If there is not value name, return all the values.
  if (value_name == nil ) then
    local text = ""
    for key,value in pairs(config.values) do
      text = text..key.." = "..value.."\n"
    end
    return text
  end 
  local value = config.values[value_name]
  if ( value == nil) then
    return "Can't find "..value_name
  end
  return value_name.." = "..value
end

function run(msg, matches)
  local text = matches[1]
  return text
end

return {
    description = "retrieves variables saved with !set", 
    usage = "!get (value_name)",
    patterns = {"^!get ?(%a+)?$"}, 
    run = run 
}