fb_stats: Import statistics from Facebook
In lynuhs/fbAdsR: Authenticate and create Facebook API

This function will import the statistics for the chosen parameters.

1 2	fb_stats(account_id, fromDate, toDate, dimensions, metrics, breakdowns = "", level = "campaign", custom = "")

`account_id`	The account id for which you want to import data fram (needs to start with "act_").
`fromDate`	The starting date for the time range you want.
`toDate`	The ending date for the time range you want.
`dimensions`	The dimensions to use in the API request.
`metrics`	The metrics to use in the API request.
`breakdowns`	What breakdowns should be used, e.g. age, gender etc.
`level`	The level in which you want the data returned c("account","campaign","adset","ad")