Process for add eBook Vendor in Adobe Digital Edition dropdown

Can be Ebook publishers  an ebook vendor in Adobe Digital Edition. In other words, "PHI Learning" name can also be in the drop down menu when Adobe Digital Edition asks to authorize it and the option to choose an ebook vendor is shown.

I am an Ebook publisher. So I want to add an eBook Vendor name in Adobe Digital Edition dropdown like "PHI Learning".

What is the process to add an eBook Vendor in a dropdown from Adobe Digital Edition.

Please help and suggest any process for adding eBook Vendor in dropdown.