public JsonWebToken Create(string username) { var nowUtc = DateTime.UtcNow; var centuryBegin = new DateTime(1970, 1, 1).ToUniversalTime(); var iat = (long)(new TimeSpan(nowUtc.Ticks - centuryBegin.Ticks).TotalSeconds); var payload = new JwtPayload { { "sub", username }, { "iss", _options.Issuer }, { "iat", iat }, { "unique_name", username }, }; var jwt = new JwtSecurityToken(_jwtHeader, payload); var token = _jwtSecurityTokenHandler.WriteToken(jwt); _accessManager.Activate(token); return(new JsonWebToken { AccessToken = token, }); }