private JwtSecurityToken GetToken(User user)
{
// Build the claims based on the user information.
var claims = new [] {
// The "NameIdentifier" claim is required to enable retrieving a user
// based on the HttpContext.User claim principle using the user manager.
new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
new Claim(ClaimTypes.Name, user.UserName),
new Claim(ClaimTypes.Email, user.Email),
};
// Create a security token for given claims and configuration.
return(JwtTokenHelper.CreateSecurityToken(claims, configuration));
}