You can use the Authorization Code Flow which you don't need to pass in your password. 

Read the documentation and write code. You can reference code here: 

Step 1: build an authorize uri: https://github.com/tylerlong/ringcentral-python/blob/master/ringcentral_client/rest_client.py#L73-L8...
Step 2: redirect user to authorized uri in browser
Step 3: when user is redirected back, you will be able to get an auth_code, invoke this: https://github.com/tylerlong/ringcentral-python/blob/master/ringcentral_client/rest_client.py#L35-L4...

Please note that, code sample above is from an UNOFFICIAL python SDK. The official one doesn't have any helper methods for authorization code flow.

Here is a tutorial in Node for your reference: https://ringcentral-tutorials.github.io/authorization-code-flow-nodejs-express-demo/

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Thank you very much, this was incredibly helpful.

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