WALLABY early science - III. An HI study of the spiral galaxy NGC 1566 by Elagali, A, Staveley-Smith, L, Rhee, J, Wong, O, Bosma, A, Westmeier, T, Koribalski, BS, Heald, G, For, BQ, Kleiner, D, Lee-Waddell, K, Madrid, JP, Popping, A, Reynolds, TN, Meyer, MJ, Allison, JR, Lagos, CDP, Voronkov, MA, Serra, P, Shao, L, Wang, J, Anderson, CS, Bunton, JD, Bekiaris, G, Walsh, VM, Kilborn, VA, Kamphuis, P, Oh, SH