title: How to scrape a website, login to a user account and avoid to see its user password?
body: <p>Im building an application based in Ruby-On-Rails that facilitate users to obtain their information from different websites into one centralized dashboard. To do that, at the beginning the app asks for their login information (user+password) of every website.</p>
  
  <p>Because we are working with sensitive information we have to save the users data encrypted in our database. Afterwards, to login into the users account, we decrypt the password in the database and login to the webpage using his/her info.</p>
  
  <p>We want to avoid to see the user private information at any moment during the web-scraping.<strong>Is there a way to use their information to login into their account and obtain the data that they are looking for, avoiding any chance for us to see their private information ?</strong></p>