trying to handle missing or malformed json config files in crystal

gistfile1.txt

def self.create(
  client_id : String = {{ read_file("#{__DIR__}/../client_id.secret").chomp }},
  client_secret : String = {{ read_file("#{__DIR__}/../client_secret.secret").chomp }},
  config_file : String | Path = Path["~/.config/dropbox-cli/dropbox-cli.json"].expand(home: true)
)
  config_data = begin
    self.read_config(config_file)
  rescue e : File::NotFoundError
    Dir.mkdir_p(config_file.parent)
    self.write_config(config_file, DEFAULT_CONFIGURATION)
    DEFAULT_CONFIGURATION
  end
  config : Hash(String, String) = begin
    cfg = Hash(String, String).new
    pull = JSON::PullParser.new(config_data)
    pull.read_object do |key|
      case key
      when "token", "client_id", "client_secret"
        cfg[key] = pull.read_string
      else
        STDERR.puts "#{config_file}: #{key}: unknown key, ignoring"
      end
    end
    cfg
  rescue e : JSON::ParseException
    STDERR.puts "#{config_file}: #{e.message}"
    Process.exit(1)
  end
  pp config
end