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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def reset(c7n_async=None):
 """Delete all persistent cluster state. """

    click.echo('Delete db? Are you Sure? [yn] ', nl=False)
    c = click.getchar()
    click.echo()
    if c == 'y':
        click.echo('Wiping database')
        worker.connection.flushdb()
    elif c == 'n':
        click.echo('Abort!')
    else:
        click.echo('Invalid input :(')