Get the size of the data sets behind each of the GUID's offered by the base URL. This function will iterate through all the GUID's available and present the results as a data frame with the GUID, the number of rows, number of columns and dimension (as total number of cells) for each data set.
get_dimensions(base_url, api_key)
The base URL of the Junar service
The user's API key for the Junar service