fix blank emails for users with no groups
fix blank emails for users with no groups

FSFTN/Loomio,Collabforge/site-collabio,aca13jmf/loomio,loomio/loomio,HadoDokis/loomio,mlarghydracept/loomio,codingnutty/loomio,juliagra/loomio,tachyons/loomio,wangjun/loomio,piratas-ar/loomio,juliagra/DBCloomio,aca13jmf/loomio,annewchen/loomio,kimihito/loomio,FSFTN/Loomio,digideskio/loomio,labhackercd/loomio,juliagra/loomio,isomerase/loomio,sicambria/loomio,digideskio/loomio,mhjb/loomio,Collabforge/site-collabio,doomergithub/loomio,juliagra/loomio,kimihito/loomio,piratas-ar/loomio,mlarghydracept/loomio,juliagra/DBCloomio,tachyons/loomio,annewchen/loomio,codingnutty/loomio,sicambria/loomio,sicambria/loomio,tachyons/loomio,wangjun/loomio,wangjun/loomio,mlarghydracept/loomio,loomio/loomio,doomergithub/loomio,juliagra/DBCloomio,isomerase/loomio,labhackercd/loomio,digideskio/loomio,HadoDokis/loomio,mhjb/loomio,isomerase/loomio,mhjb/loomio,HadoDokis/loomio,isomerase/loomio,aca13jmf/loomio,gvalerin/loomio,loomio/loomio,loomio/loomio,annewchen/loomio,mhjb/loomio,labhackercd/loomio,sicambria/loomio,piratas-ar/loomio,HadoDokis/loomio,FSFTN/Loomio,tachyons/loomio,gvalerin/loomio,Collabforge/site-collabio,codingnutty/loomio,labhackercd/loomio,Collabforge/site-collabio,doomergithub/loomio,kimihito/loomio,gvalerin/loomio,piratas-ar/loomio,FSFTN/Loomio