Draft: Scenic login portal: Implement a hard coded account to authenticate using socket.io

This MR resolves issue #633 by

• Replacing the socket.io authentification with credentials (email,password)
  
• The only combination that will work is email: user@scenic.sat.qc.ca ; password: dummy_password
  - This authentification is not maintained between two tabs or upon reloading for now
  
• TODO If the credentials are incorrect, an explanatory message should be displayed
• This branch must run along with the Switcher branch of the same name and related to the following MR