Switch to Medhi's authentication approach

[colinpmillar]

Summary

Current approach has a "injection" risk.

Tasks required

• [x] rewrite authentication part of auth controller
• [x] test

links to other issues?

None

[colinpmillar]

From Mehdi:

using System.DirectoryServices.AccountManagement;

public bool AuthenticateAD(string username, string password)
        {
            using (var context = new PrincipalContext(ContextType.Domain, "ices.local"))
            {
                return context.ValidateCredentials(username, password);
            }
        }

[colinpmillar]

https://github.com/ices-taf/ICES.TAF.WebSite/commit/2d9a3ce348948e4ce5dbde2feccd8d4da1c80c42

[colinpmillar]

Tested and working as before 👍