JWT.cs

    var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["JwtKey"]));
    var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
    var expires = DateTime.Now.AddHours(Convert.ToDouble(_configuration["JwtExpireHours"]));

    var token = new JwtSecurityToken(
        _configuration["JwtIssuer"],
        _configuration["JwtIssuer"],
        claims,
        expires: expires,
        signingCredentials: creds
    );