RGoogleFit 0.3.1
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* add OAuth2 scopes
* reformat code

RGoogleFit 0.3.1
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* minor changes to OAuth2 functions

RGoogleFit 0.3.0
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* improved handling of OAuth2 tokens

RGoogleFit 0.2.0
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* new function GetFitOauth2Token to simplify OAuth2 authentication

RGoogleFit 0.1.0
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* initial release