SOLVED - Unable to validate credentials


I can’t validate my credentials, i’ve read the documentation so much again & again.
I didn’t found something that could a reason why… I tried multiple times…

Here my request ID de8c6f60-84fc-11e7-b7aa-ef179cba9c77

Is there a way to check the request ID by ourself ?
Can you tell me what to do to fixed this?

Thx a lot!