rake task to write displaynames coming from a csv file to the database

lib/tasks/write_displaynames.rake

@@ -0,0 +1,17 @@
+namespace :user do
+require 'csv'
+
+desc 'write displaynames retrieved from the account service as csv into the codeocean database'
+ 
+task :write_displaynames, [:file_path_read]  => [ :environment ] do |t, args|
+
+   csv_input = CSV.read(args[:file_path_read], headers:true)
+
+    csv_input.each do |row|
+      user = ExternalUser.find_by(:external_id => row[0])
+      puts "Change name from   #{user.name} to #{row[1]}"
+      user.update(name: row[1])
+    end
+  end
+end
+