[HttpGet("set/{data}")]
public IActionResult SetData(string,keyname,string data)
{
    HttpContext.Session.SetString(keyname, data);
    return Ok("session data set");
}

[HttpGet("get")]
public IActionResult GetData(string keyname)
{
    var sessionData = HttpContext.Session.GetString(keyname);
    return Ok(sessionData);
}