Clarify `set_ipums_api_key()` usage#96

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robe2037 wants to merge 2 commits intomainfrom

Commits on Nov 1, 2025

Clarify `set_ipums_api_key()` usage (resolves #95)
robe2037
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Commits on Nov 24, 2025

Revert the default value of save argument to `overwrite` in set_ipums_api_key, and add two more examples; potentially resolves #95
dtburk
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