savvihub.login a training or testing loop to log a dictionary of metrics. Provide the
stepparameter for the loop unit (normally the epoch value) and any metrics you want to log as a dictionary in the
savvihub.logto log image objects. Provide a list of
savvihub.Imageobjects with image data and captions as the
rowparameter with any dictionary key. Note that only the first key will be logged.