api_key_manager 8.x-1.0-alpha1

First release of the module, currently in alpha. I have gone through the steps of manual testing this module – but would very much like to add automated testing in the next alpha.

If you have input to which test scenaries should be covered please don't hesitate reaching out on either twitter @lslinnet, on slack @lslinnet or optimal as an issue here on d.o