[sso-admin] Fix issue when editing users

Co-written with:	@elena61

dd-sso/admin/src/admin/lib/admin.py

@@ -1618,7 +1618,7 @@ class Admin:
         internaluser : DDUser = [u for u in self.internal["users"] if u["id"] == user_id][0]
         cohorts = self.moodle.get_cohorts()
         for group in mdelete:
-            cohort = [c for c in cohorts if c["name"] == group[0]][0]
+            cohort = [c for c in cohorts if c["name"] == group][0]
             try:
                 self.moodle.delete_user_in_cohort(
                     internaluser["moodle_id"], cohort["id"]
@@ -1908,7 +1908,7 @@ class Admin:
             "  NEXTCLOUD USERS: Creating nextcloud user: "
             + u["username"]
             + " in groups "
-            + str(list)
+            + str(u.get("groups", []))
         )
         try:
             # Quota is in MB