/**
* Balance of user in stream.
*
* @param address (string): wallet address (if this not provide, address of current account on metamask will be use)
* @param tokenAddress (string): address of token
*
* @return Promise<string: fee of stream>
*/
CalamusInstance.feeOf("0xB775fa6D48ec0e8394bbD6bE52956Bde7e036a36", "0x599B507bcfC75C08dF2726Cb6EC533cef74a4E04")
.then(result => console.log('Result: ', result)).catch(error => console.log('Error: ', error));
or use async await function
const result = await CalamusInstance.feeOf("0xB775fa6D48ec0e8394bbD6bE52956Bde7e036a36", "0x599B507bcfC75C08dF2726Cb6EC533cef74a4E04")
