POST https://matchup.io/users/sign_in
  utf8=✓                         (hidden readonly)
  authenticity_token=diJec2QOaXyKKSFfemWgQhfJo1Y9zIPg2PyiF9oajMK/JlmhIg7HOQvuy3BlVMx0jUvZIX8xeh5kNbDm+MqCLA== (hidden readonly)
  user[remember_me]=1            (hidden readonly)
  user[email]=                   (email)
  user[password]=                (password)
  button=<UNDEF>                 (submit)