Adding authorization requirement for group write APIs.
Adding authorization requirement for group write APIs.

Gh-27

miketaylr/frontend,EMarcais/frontend,yetixxx83/frontend,photo/frontend,ashwingj/frontend,Yetangitu/frontend,meatcar/frontend,yetixxx83/frontend,mrzen/trovebox,Yetangitu/frontend,yetixxx83/frontend,photo/frontend,ashwingj/frontend,mrzen/trovebox,unhosted/openphoto,photo/frontend,photo/frontend,meatcar/frontend,EMarcais/frontend,mrzen/trovebox,meatcar/frontend,meatcar/frontend,yetixxx83/frontend,mrzen/trovebox,ashwingj/frontend,EMarcais/frontend,Yetangitu/frontend,unhosted/openphoto,miketaylr/frontend,unhosted/openphoto,miketaylr/frontend,ashwingj/frontend,Yetangitu/frontend,EMarcais/frontend