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## 1.20.1

**`(fix):`** Fix the generated client constructor requiring every auth credential under
`auth: endpoint-security`. A credential without a configured environment variable (e.g. an
apiKey header) was emitted as a required keyword argument, so a caller authenticating with a
single scheme (such as pure OAuth) could not construct the client without also passing the
other schemes' credentials. Under endpoint-security every credential now defaults to `nil`,
matching the per-endpoint auth model. Behavior outside endpoint-security is unchanged.