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I was able to implement the below JWT solution in my MVC WebApi following below link JWT Authentication for Asp.Net Web Api

Now, I want to access claim in the controllers, but all claims are null. I have tried a few things and all of them returns null.

How is claim added in JwtAuthenticationAttribute:

protected Task<IPrincipal> AuthenticateJwtToken(string token)
 
 string username;

 if (ValidateToken(token, out username))
 
 //Getting user department to add to claim.
 eTaskEntities _db = new eTaskEntities();
 var _user = (from u in _db.tblUsers join d in _db.tblDepartments on u.DepartmentID equals d.DepartmentID select u).FirstOrDefault();
 var department = _user.DepartmentID;

 // based on username to get more information from database in order to build local identity
 var claims = new List<Claim>
 
 new Claim(ClaimTypes.Name, username),
 new Claim(ClaimTypes.SerialNumber, department.ToString())
 // Add more claims if needed: Roles, ...
 ;

 var identity = new ClaimsIdentity(claims, "Jwt");
 IPrincipal user = new ClaimsPrincipal(identity);

 return Task.FromResult(user);
 

 return Task.FromResult<IPrincipal>(null);
 

What I have tried so far

Extension method to get claim:

public static class IPrincipleExtension

 public static String GetDepartment(this IIdentity principal)
 
 var identity = HttpContext.Current.User.Identity as ClaimsIdentity;
 if (identity != null)
 
 return identity.FindFirst("SerialNumber").Value;
 
 else
 return null;
 

Using the function defined in the post (link above):

TokenManager.GetPrincipal(Request.Headers.Authorization.Parameter).FindFirst("SerialNumber")

Trying to access Claim through thread:

((ClaimsPrincipal)System.Threading.Thread.CurrentPrincipal.Identity).FindFirst("SerialNumber")

For all the above, a claim is always null. What am I doing wrong?