private ClaimsPrincipal GetPrincipalFromExpiredToken(string token)
{
var tokenValidationParameters = securityConfiguration.GeTokenValidationParameters();
tokenValidationParameters.ValidateLifetime = false;
var tokenHandler = new JwtSecurityTokenHandler();
var principal = tokenHandler.ValidateToken(token, tokenValidationParameters, out var securityToken);
if (securityToken is JwtSecurityToken jwtSecurityToken &&
jwtSecurityToken.Header.Alg.Equals(securityConfiguration.SigningAlgorithm, StringComparison.InvariantCultureIgnoreCase))
{
return(principal);
}
return(null);
}