Fixed returning type to Boolean of the isGithubCredentialsValid method
Fixed returning type to Boolean of the isGithubCredentialsValid method

mickaelandrieu/gush,dcsg/gush,sstok/gush,gushphp/gush,webflo/gush,pierredup/gush,pierredup/gush,mickaelandrieu/gush,cordoval/gush,sstok/gush,webflo/gush,cordoval/gush,pierredup/gush,gushphp/gush,gushphp/gush,sstok/gush,gushphp/gush,cordoval/gush,webflo/gush