Using a custom accessor

[disparate1]

Hi!
my data array is like this:

// ResultSet.tablePivot() will return
[
  { "Stories.time": "2015-01-01T00:00:00", "Stories.count": 27120 },
  { "Stories.time": "2015-02-01T00:00:00", "Stories.count": 25861 },
  { "Stories.time": "2015-03-01T00:00:00", "Stories.count": 29661 },
  //...
]
// ResultSet.tableColumns() will return
[
  { key: "Stories.time", title: "Stories Time", shortTitle: "Time", type: "time", format: undefined },
  { key: "Stories.count", title: "Stories Count", shortTitle: "Count", type: "count", format: undefined },
  //...
]

And i have this on my React-table v6

  columns={resultSet.tableColumns().map(c => ({ ...c, Header: c.shortTitle,accessor: c.key}))}
            data={resultSet.tablePivot()}

the data won't show in the table, i know that i need to supply a custom function for the accessor, i tried this:

columns={resultSet.tableColumns().map(c => ({ ...c, Header: c.shortTitle,accessor: (row)=>row.c.key}))}

with no luck.
How can i set a custom accessor?