question

Hi, I am trying to implement ADM for one of my existing app which is already hosted in Amazon Store by following this link ( https://developer.amazon.com/public/apis/engage/device-messaging/tech-docs/04-integrating-your-app-with-adm). I made all the necessary changes, such as - Generating the API Key and placing that api key under assets folder of my project with file name api_key.txt. However, while running the app I get error log as- ADM Error INVALID_SENDER - Unable to parse API Key for package name. Did you forget to embed it? Even, I observed it never goes to onRegistered() method resulting I am not able to get registrationID. Please help me to overcome from this issue. [b]Note:[/b]For generating API key I am already using MD5 signature for my keystore file.