https://kalmar2.org/simplesaml/module.php/aggregator/?id=kalmarcentral2&set=saml2&exclude=sweden&mimetype=application/xml kalmar-signer.crt
http://mds.edugain.org edugain.crt
https://callback-prod.inloggning.se/authify/metadata/?fed_name=swamidfederation
http://metadata.ukfederation.org.uk/ukfederation-export.xml ukfederation.pem