setup method

Implementation

setup() async {
  // get database file path
  _dbFile = FilePath().db!;

  // get database instance
  _dbInst =
      await openDatabase(_dbFile, version: 1, onCreate: (database, version) {
    database.execute(
        'create table $keyValueTableName ($keyColumnName text, $valueColumnName text)');
    if (onCreate != null) {
      onCreate!(database, version);
    }
  });
}