_address(string) The address in which to delegate voting rights to.
[options](CallOptions) Options to set for
eth_call, optional ABI (as JSON object), and Ethers.js method overrides. The ABI can be a string of the single intended method, an array of many methods, or a JSON object of the ABI generated by a Solidity compiler.
RETURN(object) Returns an Ethers.js transaction object of the vote transaction.