Edit File: Constants.php
<?php namespace PragmaRX\Google2FA\Support; class Constants { /** * Characters valid for Base 32. */ const VALID_FOR_B32 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567'; /** * Characters valid for Base 32, scrambled. */ const VALID_FOR_B32_SCRAMBLED = '234567QWERTYUIOPASDFGHJKLZXCVBNM'; /** * SHA1 algorithm. */ const SHA1 = 'sha1'; /** * SHA256 algorithm. */ const SHA256 = 'sha256'; /** * SHA512 algorithm. */ const SHA512 = 'sha512'; }