Allow to change path of configuration file

[fhg-isi]

Is your feature request related to a problem? Please describe.

According to documentation the configuation file has to be at a fixed place:

Paste the 2 line code into a %USERPROFILE%.cdsapirc file, where in your windows environment, %USERPROFILE% is usually located at C:\Users\Username folder).

I want to use cdsapi with a portable version of python and therefore would prefer if I could adapt the path.

Please provide an option to do so (or document it if already available)

[marceloandrioni]

Hello @fhg-isi , I haven't tried this, but this line indicates that you can set a environment variable named CDSAPI_RC with the path to the .cdsapirc file. If not found, the standard location (~/.cdsapirc) is used.