No username

config/database.yml

@@ -32,7 +32,7 @@ development:
   # To create additional roles in postgres see `$ createuser --help`.
   # When left blank, postgres will use the default role. This is
   # the same name as the operating system user running Rails.
-  username: <%= ENV.fetch("DB_USERNAME") { "iv_cbv_payroll" } %>
+  username: <%= ENV.fetch("DB_USERNAME") { nil } %>
 
   # The password associated with the postgres role (username).
   password: <%= ENV.fetch("DB_PASSWORD") { nil } %>