Update token_data with response variable

[ameio]

Error face when used smart_api.generateToken

(node:9820) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'refreshToken' of undefined
at E:\project\stock\pms-music\node_modules\smartapi-javascript\lib\smartapi-connect.js:222:41
at processTicksAndRejections (internal/process/task_queues.js:95:5)
(Use node --trace-warnings ... to show where the warning was created)
(node:9820) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the
CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:9820) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Audio played successfully.

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this error we face when try to use generatToken function
so i update that function and please approved my PR after check code review

[ameio]

@anurag-amx @moizm89
please check when you get some time