How to load the UniOffice license key?

UniOffice licenses can only be loaded via code. The package used to load the UniOffice license is  github.com/unidoc/unioffice/common/license. 

As of now, UniOffice license loading via environment variables is not supported.

To following play illustrates the license key loading for UniOffice. Make sure the key is separated the same way as mentioned in the below example