"match may not be exhaustive" with Case Class Macros

The following code

`Macros.createCodecProviderIgnoreNone[Account]()`
 

generates the following error

```
match may not be exhaustive.
It would fail on the following input: (x: String forSome x not in "Account")
    Macros.createCodecProviderIgnoreNone[Account]()
```

We have the scala compiler flags to catch missing cases, but I dont see where in the the expanded code there would be a missing case issue.

Thanks!