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Solve the following problem using Python, implementing the functions described below, one line at a time
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<USER_TASK:>
Description:
 def identity(ctx, variant_id):
 """Check how well SVs are working in the database """

    if not variant_id:
        LOG.warning("Please provide a variant id")
        ctx.abort()

    adapter = ctx.obj['adapter']
    version = ctx.obj['version']
    
    LOG.info("Search variants {0}".format(adapter))
    
    result = adapter.get_clusters(variant_id)
    if result.count() == 0:
        LOG.info("No hits for variant %s", variant_id)
        return
    
    for res in result:
        click.echo(res)