[root@svr34 bin]# gitlab-rails console production
Loading production environment (Rails 4.2.5.2)
irb(main)::> user = User.where(id: ).first
=> #<User id: , email: "admin@example.com", ...
irb(main)::> user.password=
=>
irb(main)::> user.password_confirmation=
=>
irb(main)::> user.save
=> true
irb(main)::> quit