Store avatars as binary instead of base64

app/services/ldap_manager/fetch_avatar.rb

@@ -5,12 +5,12 @@ module LdapManager
     end
 
     def call
-      treebase   = ldap_config["base"]
+      treebase = ldap_config["base"]
       attributes = %w{ jpegPhoto }
-      filter     = Net::LDAP::Filter.eq("cn", @cn)
+      filter = Net::LDAP::Filter.eq("cn", @cn)
 
       entry = client.search(base: treebase, filter: filter, attributes: attributes).first
-      entry.try(:jpegPhoto) ? entry.jpegPhoto.first : nil
+      entry&.jpegPhoto ? entry.jpegPhoto.first : nil
     end
   end
 end