Only allow email addresses from research institutions (measure against evil)

[paulmueller]

Maybe use domains from wiki data or from that one git repository:

• https://www.wikidata.org/wiki/Q3918
• https://www.wikidata.org/wiki/Q3918
• https://www.wikidata.org/wiki/Q31855
• https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/queries/examples#Universities_ranked_by_PageRank_on_English_Wikipedia_(federated_query)
• https://query.wikidata.org/embed.html#SELECT%20%3FuniversityDescription%20%3Fwebsite%20%3Fcoord%20%3FUN_code_classification%20%3Flocated_in_the_administrative_territorial_entity%20%3Flocated_in_the_administrative_territorial_entityLabel%20%3FISO_3166_1_alpha_2_code%20%3Funiversity%20%3FuniversityLabel%20WHERE%20%7B%0A%20%20%3Funiversity%20(wdt%3AP31%2Fwdt%3AP279*)%20wd%3AQ3918.%0A%20%20%3Funiversity%20wdt%3AP625%20%3Fcoord.%0A%20%20OPTIONAL%20%7B%20%3Funiversity%20wdt%3AP856%20%3Fwebsite.%20%7D%0A%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22en%2Cde%22.%20%7D%0A%20%20OPTIONAL%20%7B%20%3Funiversity%20wdt%3AP17%20%3FUN_code_classification.%20%7D%0A%20%20OPTIONAL%20%7B%20%3Funiversity%20wdt%3AP131%20%3Flocated_in_the_administrative_territorial_entity.%20%7D%0A%20%20OPTIONAL%20%7B%20%3Funiversity%20wdt%3AP297%20%3FISO_3166_1_alpha_2_code.%20%7D%0A%20%20%3Funiversity%20wdt%3AP17%20wd%3AQ30.%0A%7D%0ALIMIT%2025
• https://github.com/Hipo/university-domains-list/issues/284
• https://github.com/Hipo/university-domains-list/

[paulmueller]

Wait for https://github.com/ckan/ckan/issues/6070

[paulmueller]

Currently, a stub of this is implemented via the user_create auth function.