Making this conversation private since you've shared your API keys and user credentials via the graphic (and we wouldn't want someone to hack your account with this information).
I see you're trying to hit the Production API Endpoint URI: https://platform.ringcentral.com/restapi/oauth/token are your keys being used for that environment or are they for the Sandbox API Endpoint URI: https://platform.devtest.ringcentral.com/restapi/oauth/token ?
Are the user credentials being used associated with the appropriate environment?
I see you're trying to hit the Production API Endpoint URI: https://platform.ringcentral.com/restapi/oauth/token are your keys being used for that environment or are they for the Sandbox API Endpoint URI: https://platform.devtest.ringcentral.com/restapi/oauth/token ?
Are the user credentials being used associated with the appropriate environment?
Before testing the service, following things to be checked:
correct client I'd and secret, username should be phone number and extention number should be correct and allowed permission and correct url based on environment like sandbox/ production
This thread is quite old. Please make a new question with your own environment and expectation.
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