Introduce authorizations with Rajska

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/graphql/schema/followed_group_activity.ex

@@ -6,12 +6,14 @@ defmodule Mobilizon.GraphQL.Schema.FollowedGroupActivityType do
 
   @desc "A paginated list of follow group events"
   object :paginated_followed_group_events do
+    meta(:authorize, :user)
     field(:elements, list_of(:followed_group_event), description: "A list of follow group events")
     field(:total, :integer, description: "The total number of follow group events in the list")
   end
 
   @desc "A follow group event"
   object :followed_group_event do
+    meta(:authorize, :user)
     field(:user, :user)
     field(:profile, :person)
     field(:group, :group)