httr2
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Update env var advice
i.e. don't store anyway; grab live when creating request. If provide user facing function, note weakrefs
I remember reading about weakrefs in the DSLC.io {rlang} "book" club (https://youtu.be/q78fjUUAgA4), but I didn't grok when to use/think about them. I'm excited to read this advice!