def load_config
      path = ENV['HOME'] + '/.nadb.config'
      if !File.exists?(path)
        return
      end

      @config = JSON.parse(File.read(path))
    end
def load_config
      path = ENV['HOME'] + '/.nadb.config'
      if !File.exists?(path)
        return
      end

      @config = JSON.parse(File.read(path))
    end
Load config from the file if any exists