A wrapper to the get_api_graph method defined in the Credentials,
Token, and Apikey classes.
get_api_graph(url, file_ext = ".png", profile = myProfile)a character of API URL.
a non-empty character vector giving the file extension.
Default is .png.
an object of class Auth.
Default is myProfile.
An object of class response.
if (FALSE) {
myProfile <- create_profile("", "")
url <- "http://httpbin.org/image/png"
api_data_graph <- get_api_graph(url)
names(api_data_graph)
img <- png::readPNG(api_data_graph$graph)
grid::grid.raster(img)
}