.Petfinder.class        Internal R6 class
Petfinder               Creates an authenticated connection with the
                        Petfinder API. The stored authentication is
                        then used to call the Petfinder API methods. An
                        API key can be obtained from Petfinder by
                        creating an account on their developer page
                        (https://www.petfinder.com/developers/api-key).
                        The function wraps the .Petfinder.class R6
                        class.
animal_types            Returns data on an animal type, or types
                        available from the Petfinder API. This data
                        includes the available type's coat names and
                        colors, gender and other specific information
                        relevant to the specified type(s). The animal
                        type must be of 'dog', 'cat', 'rabbit',
                        'small-furry', 'horse', 'bird',
                        'scales-fins-other', 'barnyard'.
animals                 Returns adoptable animal data from Petfinder
                        based on specified criteria.
breeds                  Returns breed names of specified animal type,
                        or types.
organizations           Returns data on an animal welfare organization,
                        or organizations, based on specified criteria.
