Check for duplicate usernames and prompt again
Check for duplicate usernames and prompt again

jaseg/securedrop,ageis/securedrop,jaseg/securedrop,micahflee/securedrop,kelcecil/securedrop,chadmiller/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,pwplus/securedrop,harlo/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,pwplus/securedrop,heartsucker/securedrop,harlo/securedrop,GabeIsman/securedrop,garrettr/securedrop,GabeIsman/securedrop,chadmiller/securedrop,micahflee/securedrop,jaseg/securedrop,jrosco/securedrop,ehartsuyker/securedrop,jeann2013/securedrop,GabeIsman/securedrop,ageis/securedrop,micahflee/securedrop,jeann2013/securedrop,GabeIsman/securedrop,GabeIsman/securedrop,jeann2013/securedrop,chadmiller/securedrop,kelcecil/securedrop,garrettr/securedrop,conorsch/securedrop,garrettr/securedrop,pwplus/securedrop,pwplus/securedrop,jrosco/securedrop,kelcecil/securedrop,jeann2013/securedrop,chadmiller/securedrop,kelcecil/securedrop,jaseg/securedrop,ageis/securedrop,pwplus/securedrop,harlo/securedrop,garrettr/securedrop,ehartsuyker/securedrop,jaseg/securedrop,harlo/securedrop,jeann2013/securedrop,chadmiller/securedrop,harlo/securedrop,kelcecil/securedrop,jrosco/securedrop,conorsch/securedrop,jrosco/securedrop,pwplus/securedrop,jaseg/securedrop,harlo/securedrop,ehartsuyker/securedrop,chadmiller/securedrop,kelcecil/securedrop,GabeIsman/securedrop,heartsucker/securedrop,jeann2013/securedrop,jrosco/securedrop,conorsch/securedrop,micahflee/securedrop,jrosco/securedrop,ageis/securedrop,heartsucker/securedrop,ehartsuyker/securedrop