If null
, the URL used in application registration will be used.
See https://developer.github.com/v3/oauth/#redirect-urls.
# The URL in your application where users will be sent after authorization.
#
# If `null`, the URL used in application registration will be used.
#
# See https://developer.github.com/v3/oauth/#redirect-urls.
var redirect_uri: nullable String is writable
lib/popcorn/pop_auth.nit:150,2--155,46