The Usage section for Firebase Authentication should indicate where the sample code should be placed. It's not clear to a new developer if that code should be in a Widget or in the main method.

Google suggests enabling gzip compression before transferring files over the network:

In order to receive a gzip-encoded response you must do two things: Set an Accept-Encoding header, and modify your user agent to contain the string gzip. Here is an example of properly formed HTTP headers for enabling gzip compression:

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