By default the plugin uses lower case letters in all codes, but it is possible to change the case of code letters to use only majuscule or minuscule letters.
To achieve this, follow the next steps.
- Open the
ougcinvitesystem_content_rowtemplate for edit.
- Change
{$code['code']}to{$upper_code}.
- Save.
This should display codes as displayed in the image.