gist-logs: require API credentials.
gist-logs: require API credentials.

Anonymous gists are going away shortly:
https://github.com/blog/2503-deprecation-notice-removing-anonymous-gist-creation

sjackman/homebrew,reitermarkus/brew,DomT4/brew,maxim-belkin/brew,mgrimes/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,EricFromCanada/brew,ilovezfs/brew,reitermarkus/brew,Linuxbrew/brew,JCount/brew,maxim-belkin/brew,konqui/brew,vitorgalvao/brew,JCount/brew,JCount/brew,Homebrew/brew,mgrimes/brew,sjackman/homebrew,hanxue/linuxbrew,Linuxbrew/brew,mahori/brew,mahori/brew,MikeMcQuaid/brew,claui/brew,alyssais/brew,hanxue/linuxbrew,DomT4/brew,Linuxbrew/brew,sjackman/homebrew,nandub/brew,Homebrew/brew,claui/brew,Homebrew/brew,hanxue/linuxbrew,Linuxbrew/brew,alyssais/brew,ilovezfs/brew,JCount/brew,alyssais/brew,MikeMcQuaid/brew,nandub/brew,konqui/brew,reitermarkus/brew,ilovezfs/brew,nandub/brew,reitermarkus/brew,EricFromCanada/brew,claui/brew,vitorgalvao/brew,mahori/brew,DomT4/brew,sjackman/homebrew,EricFromCanada/brew,nandub/brew,claui/brew,konqui/brew,mahori/brew,vitorgalvao/brew,vitorgalvao/brew,DomT4/brew,konqui/brew,Homebrew/brew,maxim-belkin/brew,EricFromCanada/brew,mgrimes/brew