Show last access info after successful login

[byewokko]

Is your feature request related to a problem? Please describe.

As soon as the authentication process is completed, the user will be shown the date and time of his last successful access, as well as the number of failed authentications since that date.

Describe the solution you'd like

• In a successful PUT /public/login response, the server should include
  • last successful login timestamp,
  • number of failed login attempts since last successful login,
  • (optionally) last successful login IP address and user-agent,
  • (optionally) last failed login IP address and user-agent.
• The login UI should display the above information in a toast notification before redirecting the user to the authorization endpoint.