Add warning about no possibility to have two credentials set

[Fix] Fix regression philippelt#62

Merge branch 'master' of https://github.com/philippelt/netatmo-api-py…

…thon

[Change] Allow station access by id to handle duplicate name philippe…

…lt#53

[Change] Switch authent to use a pre-granted refresh token

Merge pull request philippelt#45 from cclauss/patch-1

GitHub Action to lint Python code
Many thanks Christian for your help in reviewing the code !!

Doc

[Minor] Add a warning message when running on window and USERNAME is set

[Change] Added UserInfo class to get units for weatherdata info

Fix lost modules missing data (thanks Jarkko)