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    David Kimura PRO said about 4 years ago on Two Factor Authentication :
     ☒ Looks like they changed their API a bit.

    user.otp_code # => '850738'

    qr = RQRCode::QRCode.new('http://github.com')
result = ''

qr.qrcode.modules.each do |row|
  row.each do |col|
    result << (col ? 'X' : 'O')
  end

  result << "\n"
end
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