jwt authentication identity not authenticating code example

Example: c# core jwt

// more generic
private string GenerateJSONWebToken()
{
    var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("MynameisJamesBond007"));
    var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);
 
    var token = new JwtSecurityToken(
        issuer: "https://www.yogihosting.com",
        audience: "https://www.yogihosting.com",
        expires: DateTime.Now.AddHours(3),
        signingCredentials: credentials
        );
 
    return new JwtSecurityTokenHandler().WriteToken(token);
}