docs: def keypair_add(self, name, pubfile=None, pubkey=None):
          '''
          Add a keypair
          '''
          nt_ks = self.compute_conn
          if pubfile:
              with salt.utils.files.fopen(pubfile, 'r') as fp_:
                  pubkey = salt.utils.stringutils.to_unicode(fp_.read())
          if not pubkey:
              return False
          nt_ks.keypairs.create(name, public_key=pubkey)
          ret = {'name': name, 'pubkey': pubkey}
          return ret