UiO: Sjekk om fødselsnummer/passnummer er i bruk i IGA

Se hver enkelt commit for detaljer.

gregsite/settings/base.py

@@ -341,3 +341,9 @@ DEFAULT_IDENTITY_SOURCE = "greg"
 # Toggle to prevent verification of NIN from the sponsor frontend.
 # Introduced to prevent using greg for takeover of existing accounts in IGA.
 DISABLE_NIN_VERIFY = False
+
+# Iga client config used by identity checking view when checking iga
+IGA_CLIENT = {
+    "url": "http://example.com/cerebrum/",
+    "headers": {"X-Gravitee-Api-Key": "<KEY>"},
+}