don't send invite when email is empty
don't send invite when email is empty

amyhua/QnA,gravityrail/shapado,ricodigo/shapado,stan/shapado,stan/shapado,gravityrail/shapado,stan/shapado,cctuan/shapado_g,ricodigo/shapado,amyhua/QnA,ooohiroyukiooo/shapado,sinnerex/zoorab,amyhua/QnA,ooohiroyukiooo/shapado,10xEngineer/shapado,sinnerex/zoorab,10xEngineer/shapado,10xEngineer/shapado,NazarK/shapado,cctuan/shapado_g,ooohiroyukiooo/shapado,NazarK/shapado,cctuan/shapado_g,ooohiroyukiooo/shapado,ricodigo/shapado,gravityrail/shapado,NazarK/shapado,sinnerex/zoorab,stan/shapado