Examples have a problem with WriteHeader()/Write() ordering

[ptman]

Description

webauthn/webauthn/example_passkey_test.go

Lines 112 to 121 in 16a1b65

	encoder := json.NewEncoder(rw)
	if err = encoder.Encode(creation); err != nil {
	rw.WriteHeader(http.StatusInternalServerError)
	return
	}
	rw.Header().Set("Content-Type", "application/json; charset=utf-8")
	rw.WriteHeader(http.StatusOK)

https://pkg.go.dev/net/http#ResponseWriter

WriteHeader() should be called before Write(), not after. Cannot write headers once the body has been written. In the other examples as well.

Additional Information

No response