Follow the online documentation here: http://code.markedmondson.me/googleAnalyticsR/
First Google Analytics Reporting v4 API library for R
v4 features include: dynamic calculated metrics, pivots, histograms, date comparisons, batching
Multi-user login in Shiny App
Integration with BigQuery Google Analytics Premium/360 exports
Single authentication flow with other 'googleAuthR' apps
Automatic batching
sampling avoidance with daily walk
multi-account fetching
multi-channel funnnels
Support for batch. For big data calls this could be 10x quicker than normal GA fetching
Meta data included in attributes of returned dataframe