dateTime method Null safety
Use this as the body of a getter to declare a column that holds date and time.
Drift supports two modes for storing date times: As unix timestamp with second accuracy (the default) and as ISO 8601 string with microsecond accuracy. For more information between the modes, and information on how to change them, see the documentation.
DateTime values are stored on a second-accuracy.
Example (inside the body of a table class):
DateTimeColumn get accountCreatedAt => dateTime()();
@protected ColumnBuilder<DateTime> dateTime() => _isGenerated();