Invisibly returns the path to the folder where the file is stored.
When path = NULL, the file will be stored in the R temporary
folder as: api_specification.json
Arguments
path
A character with the path to the folder where the downloaded data
dictionary should be stored. Default is NULL i.e. the data dictionary
will be stored in tempdir()
overwrite
A logical used to specify whether to overwrite to overwrite
the existing data dictionary or not. Default is TRUE