def METHOD_NAME(client, snapshot_name="snapshot-1"):
    client.create_db_instance(
        DBInstanceIdentifier="db-primary-1",
        AllocatedStorage=10,
        Engine="postgres",
        DBName="staging-postgres",
        DBInstanceClass="db.m1.small",
        MasterUsername="root",
        MasterUserPassword="hunter2",
        Port=1234,
        DBSecurityGroups=["my_sg"],
    )
    resp = client.create_db_snapshot(
        DBInstanceIdentifier="db-primary-1", DBSnapshotIdentifier=snapshot_name
    )
    return resp["DBSnapshot"]["DBSnapshotArn"]