Provide authentication using Stormpath.
This driver requires some extra configuration beyond that which Stormpath normally requires.
stormpath:
apiid: 1234567890
apikey: 1234567890/ABCDEF
# Can use an application ID
application: 6789012345
# Or can use a directory ID
directory: 3456789012
# But not both
New in version 2015.8.0.