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Implemented certificate generator for Drupal Mumbai Camp.
Made changes to the method of QR code generation.
- hexadecimal hash is generated.
- first few characters of hash are considered as unique key.
- If the key is not unique then an additional character is added to the key.
- QR code now contains only the link with the key.
- the link gets the data of the certificate holder.
- in the absence of the QR code scanner, the key and link are
provided below the QR code.
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