vagrant@homestead:~/code/saas$ php bin/console doctrine:migrations:diff --configuration=config/migrations/client.yaml --em=client

  The "--em" option does not exist.

doctrine:migrations:diff [--configuration CONFIGURATION] [--db-configuration DB-CONFIGURATION] [--namespace NAMESPACE] [--filter-expression FILTER-EXPRESSION] [--formatted] [--line-length LINE-LENGTH] [--check-database-platform [CHECK-DATABASE-PLATFORM]] [--allow-empty-diff] [-h|--help] [-q|--quiet] [-v|vv|vvv|--verbose] [-V|--version] [--ansi] [--no-ansi] [-n|--no-interaction] [-e|--env ENV] [--no-debug] [--subdomain] [--] <command>