**Background**
The template [[ https://en.wikipedia.org/wiki/Template:Find_sources | Find Sources ]] is used heavily on English and other Wikipedias, and on en.wp includes a link to The Wikipedia Library. Every other link in this template grabs the relevant article title and prefills a search URL to search for reliable sources about that topic. TWL's link is the only one which currently doesn't do this - editors can't easily construct a URL because our EBSCO Discovery Service search requires authentication via Referring URL, and therefore has no stable URL pattern.
Instead, we can create a means of redirecting users from a Library Card URL through to search, enabling them to correctly authenticate, while reducing the number of required steps to initiate a search. For example, something like https://wikipedialibrary.wmflabs.org/?search=search_term.
This idea was prompted by discussion at https://en.wikipedia.org/w/index.php?title=Module_talk:Find_sources&oldid=1053225905#Wikipedia_library
**Acceptance criteria**
- There is a URL pattern which users can fill with a string which, when clicked, will take them to EDS search results for that string
- Users who are not logged in to the library should be taken via the standard login prompt (T292509) and continue on to their intended destination.
- Users who are already logged in should arrive directly at the search results
- This should behave like the 'normal' search bar behaviour, including respecting the user's language preference.