It seems you're using HTTP in the redirect URL, but you're trying to authenticate with HTTPS. Change the URL in $my_url to https: and see if it works.
There might be other ways to fix this but the php way usually never worked for me. I changed the approach to Javascript sdk way and things have been better.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.