+- `DOWNLOAD_PASSWORD_REQUIREMENT`: set to 'optional' (default), 'required' or 'generated' to make a password for downloading optional, required or generated
+- `DOWNLOAD_PASSWORD_GEN_LEN`: set length of generated download passwords
+- `DOWNLOAD_PASSWORD_GEN_CHARS`: set characters used for generated download passwords
+- `DOWNLOAD_PASSWORD_POLICY`: set to 'regex' to use a regular expression to check user provided download passwords for complexity constraints
+- `DOWNLOAD_PASSWORD_POLICY_REGEX`: regex to check against if password policy is set to regex