I'm not sure if it's the right Channel but lets try. I created a Restlet. I've set up the connection. I go in Postman, run it and I get the data. Everything is fine. I take the curl and put it in Angular, .Net, PHP, GO and I'm always getting the same error INVALID_LOGIN_ATTEMPT. Any one has an idea ?

You can't just take the curl from postman. You have to calculate a new signature based on the current time stamp and an unused nonce.

just to be sure. I run it in Postman, take the "authorisation" from curl, and post it on .Net, In a matter of seconds

If you already sent the request through postman the nonce has been used

Good point. Now I have to find the trick to generate a nonce

A nonce is just a random number, not hard to generate.

Yes, I know. I had to do it for Amazon. Miserable. I will change to User Based. I needed did it but should be simple