Unable to add audiobook with number only ASIN

[Mbuckley0]

Some books on audible have ASIN numbers which are numbers only and not alphanumeric strings. These books do not show up when searching by title and throw an error when trying to search by the ASIN number.

Example: Tiamat's Wrath

https://www.audible.com/pd/Tiamats-Wrath-Audiobook/1980006520

[therobbiedavis]

@Mbuckley0 This is due to me just not knowing that ASINs could be this format 🤦

I have it fixed locally and will be in the next release.