We are going to be overriding a few of the default variables. To do this, update the group_vars/common.yml file to read like this, making sure you update the do_token value to reflect your own:
do_token: !vault | $ANSIBLE_VAULT;1.1;AES256 63376236316336633631353131313363666463363834524609643522613230653265373236353664 36653763373961313433373138633933663939452257345733336238353862383432373831393839 32316262653963333836613332366639333039393066343739303066663262323337613937623533 3461626330663363330a303538393836613835313166383030636134623530323932303266373134 35616339376138636530346632345734563457326532376233323930383535303563323634336162 31386635646636363334393664383633346636616664386539393162333062343964326561343861 33613265616632656465643664376536653334653532336335306230363834523454245337626631 ...