removed a debug message and change to a better error message when collection is not specified.
removed a debug message and change to a better error message when collection is not specified.

alexanderlz/redash,EverlyWell/redash,stefanseifert/redash,amino-data/redash,pubnative/redash,chriszs/redash,M32Media/redash,useabode/redash,useabode/redash,rockwotj/redash,getredash/redash,easytaxibr/redash,denisov-vlad/redash,useabode/redash,useabode/redash,getredash/redash,guaguadev/redash,ninneko/redash,vishesh92/redash,denisov-vlad/redash,moritz9/redash,amino-data/redash,moritz9/redash,44px/redash,vishesh92/redash,easytaxibr/redash,ninneko/redash,M32Media/redash,alexanderlz/redash,rockwotj/redash,guaguadev/redash,akariv/redash,ninneko/redash,44px/redash,akariv/redash,jmvasquez/redashtest,moritz9/redash,crowdworks/redash,alexanderlz/redash,jmvasquez/redashtest,denisov-vlad/redash,hudl/redash,amino-data/redash,chriszs/redash,easytaxibr/redash,EverlyWell/redash,stefanseifert/redash,pubnative/redash,chriszs/redash,pubnative/redash,crowdworks/redash,EverlyWell/redash,getredash/redash,rockwotj/redash,moritz9/redash,imsally/redash,denisov-vlad/redash,akariv/redash,amino-data/redash,easytaxibr/redash,stefanseifert/redash,crowdworks/redash,pubnative/redash,ninneko/redash,imsally/redash,hudl/redash,getredash/redash,44px/redash,hudl/redash,M32Media/redash,denisov-vlad/redash,akariv/redash,alexanderlz/redash,crowdworks/redash,stefanseifert/redash,M32Media/redash,guaguadev/redash,akariv/redash,hudl/redash,imsally/redash,chriszs/redash,stefanseifert/redash,jmvasquez/redashtest,jmvasquez/redashtest,vishesh92/redash,getredash/redash,easytaxibr/redash,rockwotj/redash,pubnative/redash,EverlyWell/redash,guaguadev/redash,44px/redash,jmvasquez/redashtest,vishesh92/redash,imsally/redash,guaguadev/redash,ninneko/redash