added method to check if user as an valid contribution for some project
added method to check if user as an valid contribution for some project

valorizeme/valorizeme,engageis/juntos.com.vc,paulopatto/catarse,elesban/catarse,coopsource/catarse,sushant12/jvn,diraulo/catarse,JamesUcci/webapplication,adrianob/99gamers,diraulo/catarse,nicolasiensen/labcriativo,thiagocatarse/catarse,nicolasiensen/labcriativo,egozo/producerun,paulodarosa/pollis.co,umeshduggal/flockaway,mrmarcondes/catarse,ripple0328/catarse,diogob/catarse,nicolasiensen/bookstart,vicnicius/catarse,jessicalau/vamosagir,catarse/catarse,Saharitte/catarse,ripple0328/catarse,adrianob/99gamers,magyarmosoly/akimasnakoktatas,stephenhack/yhacks,Haseeb-Qureshi/catarse,devton/catarse,jessicalau/vamosagir2,paulodarosa/mudabr,valorizeme/valorizeme,andrewyong82/100pp,valorizeme/valorizeme,thiagocatarse/catarse,juntos-com-vc/juntos.com.vc,vandofb/catarse,magyarmosoly/akimasnakoktatas,paulodarosa/pollis.co,diraulo/catarse,ripple0328/catarse,victor95pc/catarse,danielweinmann/catarse,adrianob/catarse,JamesUcci/webapplication,wlads/catarse,victor95pc/catarse,ujjwalkhanal/helpbegin,umeshduggal/flockaway,williamair1/catarse,egozo/producerun,magyarmosoly/akimasnakoktatas,globalavocado/catarse,Haseeb-Qureshi/catarse,engageis/juntos.com.vc,paulopatto/catarse,engageis/juntos.com.vc,diogob/catarse,JamesUcci/webapplication,rokibulhassan/catarse,wlads/catarse,coopsource/catarse,liberland/catarse,ujjwalkhanal/helpbegin,victor95pc/catarse,nicolasiensen/labcriativo,Haseeb-Qureshi/catarse,paulodarosa/crowd,juanmanunez/catarse,vandofb/catarse,adrianob/catarse,catarse/catarse,sushant12/jvn,andrewyong82/100pp,catarse/catarse,paulopatto/catarse,wlads/catarse,diegorv/catarse,paulodarosa/catarse,gumanoz/catarse,ripple0328/catarse,mrmarcondes/catarse,vicnicius/catarse,paulopatto/catarse,paulodarosa/pollis.co,liberland/catarse,liberland/catarse,jessicalau/vamosagir,egozo/producerun,juanmanunez/catarse,stephenhack/yhacks,umeshduggal/flockaway,gumanoz/catarse,gumanoz/catarse,paulodarosa/crowd,danielweinmann/catarse,devton/catarse,mrmarcondes/catarse,rokibulhassan/catarse,juanmanunez/catarse,globalavocado/catarse,globalavocado/catarse,andrewyong82/100pp,carmenmp/catarse,nicolasiensen/bookstart,devton/catarse,paulodarosa/catarse,Saharitte/catarse,juntos-com-vc/juntos.com.vc,stephenhack/yhacks,ujjwalkhanal/helpbegin,juntos-com-vc/juntos.com.vc,elesban/catarse,vicnicius/catarse,coopsource/catarse,jessicalau/vamosagir2,diogob/catarse,diegorv/catarse,jessicalau/vamosagir2,carmenmp/catarse,paulodarosa/catarse,Saharitte/catarse,catarse/catarse,adrianob/catarse,ujjwalkhanal/helpbegin,thiagocatarse/catarse,rokibulhassan/catarse,adrianob/99gamers,paulodarosa/mudabr,williamair1/catarse,williamair1/catarse,sushant12/jvn,devton/catarse,vandofb/catarse,diegorv/catarse,elesban/catarse,sushant12/jvn