feat: support db users in fake login

Previously we matched user against fake user data but since we read
the users from the database we can match against them in the fake
login and allow logging in with any of them.

src/clj/rems/auth/fake_shibboleth.clj

@@ -4,6 +4,7 @@
             [hiccup.util :refer [url]]
             [rems.db.core :as db]
             [rems.db.test-data :refer [+fake-user-data+]]
+            [rems.json :as json]
             [ring.util.response :refer [content-type redirect
                                         response]]))
 
@@ -45,7 +46,9 @@ a:visited { color: #fff; }
 
 (defn- fake-login [session username]
   (assoc (redirect "/#/redirect")
-         :session (assoc session :identity (get +fake-user-data+ username))))
+         :session (assoc session :identity (-> (db/get-user-attributes {:user username})
+                                               :userattrs
+                                               json/parse-string))))
 
 (defn- user-selection [username]
   (let [url (url "/Shibboleth.sso/Login" {:username username})]