prevent user from creating account with registered name
prevent user from creating account with registered name

RemitaBit/Remitabit,camponez/bitshares,camponez/bitshares,denkhaus/bitsharesx,jakeporter/Bitshares,dacsunlimited/dac_play,bitshares/bitshares,Ziftr/bitshares,drltc/keyid,denkhaus/bitsharesx,bitshares/devshares,bitshares/bitshares-0.x,frrp/bitshares,frrp/bitshares,dacsunlimited/dac_play,jakeporter/Bitshares,camponez/bitshares,FollowMyVote/bitshares,bitshares/bitshares,RemitaBit/Remitabit,dacsunlimited/dac_play,Ziftr/bitshares,camponez/bitshares,FollowMyVote/bitshares,bitsuperlab/cpp-play,bitshares/bitshares,RemitaBit/Remitabit,frrp/bitshares,bitsuperlab/cpp-play,FollowMyVote/bitshares,bitsuperlab/cpp-play,bitshares/bitshares-0.x,bitshares/bitshares-0.x,FollowMyVote/bitshares,bitshares/devshares,jakeporter/Bitshares,jakeporter/Bitshares,bitshares/bitshares,bitshares/devshares,bitsuperlab/cpp-play,dacsunlimited/dac_play,frrp/bitshares,FollowMyVote/bitshares,frrp/bitshares,bitshares/devshares,frrp/bitshares,camponez/bitshares,denkhaus/bitsharesx,bitshares/bitshares,RemitaBit/Remitabit,bitshares/bitshares-0.x,RemitaBit/Remitabit,Ziftr/bitshares,dacsunlimited/dac_play,Ziftr/bitshares,bitshares/devshares,bitsuperlab/cpp-play,camponez/bitshares,dacsunlimited/dac_play,denkhaus/bitsharesx,bitsuperlab/cpp-play,RemitaBit/Remitabit,FollowMyVote/bitshares,bitshares/devshares,bitshares/bitshares-0.x,bitshares/bitshares-0.x,drltc/keyid,drltc/keyid,jakeporter/Bitshares,drltc/keyid,jakeporter/Bitshares,bitshares/bitshares