public Map<String, String> getProperties() {
        return new LinkedHashMap<String, String>(properties);
    }
Returns a map of profile properties included in this Profile instance.
The returned properties corresponds to how this profile is described in
the credential profiles file, i.e., profiles with basic credentials
consist of two properties {"aws_access_key_id", "aws_secret_access_key"}
and profiles with session credentials have three properties, with an
additional "aws_session_token" property.
aws-java-sdk-core/src/main/java/com/amazonaws/auth/profile/internal/Profile.java