[APP][Pro] Alexa - Control your Amazon devices from Homey

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I had the same issue. Solution: you must go into your Amazon account via web browser and enable 2 factor authentication. I did this and ran it through my Google Authenticator and bam, problem solved. I was then able to integrate all my compatible Echo devices. Use the code that comes through the authenticator app, not the one that Amazon texts to you. Hope this helps.