googleSheets.createSheet adds a tab to an existing spreadsheet.
Example
Inputs
Providespreadsheet and a unique title. Optional positive rowCount and columnCount, nonnegative frozenRowCount and frozenColumnCount, zero-based index, hidden, and rightToLeft set the initial sheet. Second argument { account } selects the Google Account.
Output
ReturnsSheet metadata with sheetId, title, zero-based index, grid counts, frozen counts, visibility, direction, type, and an empty tables array.