Constant EMULATOR_ACCOUNT_KEY 

const EMULATOR_ACCOUNT_KEY: &str = "Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==";

The account key of the Azurite emulator’s EMULATOR_ACCOUNT.

NOTE: This is not a secret. Azurite ships with this key, Microsoft publishes it in the Azurite documentation, and it grants access only to local emulator instances.