class Bundler::URI::Generic

def check_user(v)


with a user component defined.
Can not have a registry or opaque component defined,

and against the Bundler::URI::Parser Regexp for :USERINFO.
Checks the user +v+ component for RFC2396 compliance
def check_user(v)
  if @opaque
    raise InvalidURIError,
      "can not set user with opaque"
  end
  return v unless v
  if parser.regexp[:USERINFO] !~ v
    raise InvalidComponentError,
      "bad component(expected userinfo component or user component): #{v}"
  end
  return true
end