Fix common followers API

app/models/account.rb

@@ -125,7 +125,7 @@ class Account < ApplicationRecord
   def common_followers_with(other_account)
     results  = Neography::Rest.new.execute_query('MATCH (a {account_id: {a_id}})-[:follows]->(b)-[:follows]->(c {account_id: {c_id}}) RETURN b.account_id', a_id: id, c_id: other_account.id)
     ids      = results['data'].map(&:first)
-    accounts = self.where(id: ids).with_counters.map { |a| [a.id, a] }.to_h
+    accounts = Account.where(id: ids).with_counters.map { |a| [a.id, a] }.to_h
     ids.map { |id| accounts[id] }.compact
   rescue Neography::NeographyError, Excon::Error::Socket
     []