Get a list of dataset

@app.route('/datasets/trajectory', methods=['GET'])
def list_datasets():
    query = "select relname as table from pg_stat_user_tables where schemaname = 'trajectory';"
    rows = conn.query(query).getresult()
    datasets = []
    for row in rows:
        datasets.append(row[0])
    return jsonify({'datasets': datasets})