Returns a scalar character indicating the host to make requests to.
Value
A scalar character, "https://www.arcgis.com" by default.
Details
By default, the host is ArcGIS Online <https://www.arcgis.com>. If the
environment variable ARCGIS_HOST is set, it will be returned.
Examples
arc_host()
#> [1] "https://www.arcgis.com"
