Fix petition: user_hero now returns error when no user signed in. This makes petition work again on code.org homepage.  A recent change for https support stopped the user_hero from returning a purely empty result when no user was signed in.
Fix petition: user_hero now returns error when no user signed in.
This makes petition work again on code.org homepage.  A recent change for https support stopped the user_hero from returning a purely empty result when no user was signed in.

ty-po/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,rvarshney/code-dot-org,ty-po/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,ty-po/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org