Cannot convert value of type 'Expression<String>' to expected argument type 'String?'

I am using the filter option get a variable I need to pass to a label as its text.

```
let naam = bowlersTable.filter(self.name == bowler)
let bowlerName = (naam[name])
self.BowlerName.setText(bowlerName)
``` 

I get the error saying : 

```
Cannot convert value of type 'Expression<String>' to expected argument type 'String?'
```

How do we change the column type to a string?
