Get the public key for **account**

        :param account: Account to get public key for
        :type account: str

        :raises: :py:exc:`nano.rpc.RPCException`

        >>> rpc.account_key(
        ...     account="xrb_1e5aqegc1jb7qe964u4adzmcezyo6o146zb8hm6dft8tkp79za3sxwjym5rx"
        ... )
        "3068BB1CA04525BB0E416C485FE6A67FD52540227D267CC8B6E8DA958A7FA039"

def account_key(self, account):
        """
        Get the public key for **account**

        :param account: Account to get public key for
        :type account: str

        :raises: :py:exc:`nano.rpc.RPCException`

        >>> rpc.account_key(
        ...     account="xrb_1e5aqegc1jb7qe964u4adzmcezyo6o146zb8hm6dft8tkp79za3sxwjym5rx"
        ... )
        "3068BB1CA04525BB0E416C485FE6A67FD52540227D267CC8B6E8DA958A7FA039"

        """

        account = self._process_value(account, 'account')

        payload = {"account": account}

        resp = self.call('account_key', payload)

        return resp['key']