Fix: Don't raise an error if expiration_time_millis is nil; fall back to 0
#552
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sampart
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expiration_time_millis is nil; fall back to 0expiration_time_millis is nil; fall back to 0
…ck to 0
`data.fetch("expiration_time_millis", 0)` will default to 0 only if the key is not present. If the key is present but the associated value is nil, then prior to this change the code would raise as follows:
```
NoMethodError (undefined method `/' for nil:NilClass
expires_at: data.fetch("expiration_time_millis", 0) / 1000
^):
```
This commit updates the code to default to 0 if the key is not found or if the value is nil.
With the existing token stores, this situation may not arise, but it's a particular issue when using a custom token store where values could be nil, like a database.
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The change
data.fetch("expiration_time_millis", 0)will default to 0 only if the key is not present. If the key is present but the associated value is nil, then prior to this change the code would raise as follows:This commit updates the code to default to 0 if the key is not found or if the value is nil.
With the existing token stores, this situation may not arise, but it's a particular issue when using a custom token store where values could be nil, like a database.
Testing
Since the existing tests don't cover the existing fallback, I've not added to them here either.
I've tested this change manually locally by modifying my copy of the gem in a test project.
Changelog
https://github.com/googleapis/google-auth-library-ruby/blob/main/.github/CONTRIBUTING.md mentions updating the CHANGELOG. However, CHANGELOG updates now appear to be an automated process so I've left this alone.