Golang BigQuery: Insert array into table

I'm trying to insert an array into a table using the bigquery golang library.

I have a table schema that looks like this. The array is the quality column, has the Repeated.

	tableSchema := bigquery.Schema{
		{Name: "issue_id", Type: bigquery.StringFieldType},
		{Name: "quality", Type: bigquery.StringFieldType, Repeated: true},
		{Name: "creation_date_ts", Type: bigquery.TimestampFieldType},
	}

This is how I defined the record:

type escalationsRecord struct {
	IssueID      bigquery.NullString    `bigquery:"issue_id"`
	Quality      []string               `bigquery:"quality"`
	CreationTime bigquery.NullTimestamp `bigquery:"creation_date_ts"`
}

This is how I create a record:

	record := escalationsRecord{
			IssueID:      bigquery.NullString{StringVal: fmt.Sprint(int(issue.Number)), Valid: true},
			Quality:      qualityArray,
			CreationTime: bigquery.NullTimestamp{Timestamp: issue.CreatedAt.Time, Valid: true},
		}
records = append(records, &record) 

This is how I put the records to BigQuery

inserter := table.Inserter()
err2 := inserter.Put(b.ctx, records)

The quality column is NULL when I look at it in bigqyery. There are no errors. The array contains elements.
Any idea how to properly insert arrays? I can't find anything in the docs.

What @BrianWagner suggested in his comment works. The only change I did was to use the InferSchema() instead of defining it myself.

So instead of

  tableSchema := bigquery.Schema{
        {Name: "issue_id", Type: bigquery.StringFieldType},
        {Name: "quality", Type: bigquery.StringFieldType, Repeated: true},
        {Name: "creation_date_ts", Type: bigquery.TimestampFieldType},
    }

I now have

	tableSchema, err := bigquery.InferSchema(escalationsRecord{})
	if err != nil {
		log.Fatal(err)
	}