Clarification on how Ring Central API OAuth2 Authentication works

Hi @Phong Vu,

I just need to verify my understanding of how the Ring Cental API works.

Let's say I have a Premium Ring Central subscription (call it Account "A"), then I develop an application that uses the Client ID and Client Secrets from this Account "A".

My understanding is that with the OAuth2 method, I could set up my application above, to direct the user's browser to the Ring Central login page, and they can login with their own Ring Central account (let's refer to this as Account "B"). Then they can Authorize my application that is tied to Account "A" to use the RC API to send SMS on behalf of Account "B".

Is my understanding correct?

Or, does Account "B" needs to have API access too? (Does Account "B" needs to have Premium subscription also?)

If develop on other platforms that uses same OAuth2 techniques and they all behaves like I described above.

I just want to verify my understanding that RC's API also behaves the same.

Thank you for any info you can give.