removed duplicate "illuminate/auth" from composer.json
Merge pull request #6 from cmgmyr/master

removed duplicate "illuminate/auth" from composer.json
Add error response message to InvalidAuthorizationCodeException when request completely fails
Don't defer loading to make it easier to register custom providers
Check whether the provider is defined before (trying to) add it.
indentation
Merge pull request #13 from syphernl/fix_providerregistration

Check provider existence before adding
Merge branch 'adamwathan-master'