In an increasingly complex edda.properties file, it is too easy to make typos in an account.name or forget a part of the proper suffix for config options.
Look into the ability to sanity check configuration options, especially around account credentials (which will silently inherit higher level credentials or try to auto-discover via metadata.
At the least, consider adding informational log messages regarding credential providers and what value the credentials were sourced from (or auto-discovered via metadata).