--owner flag value is not validated while enrolling a provider

[rdimitrov]

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We still get the Provider enrolled successfully message even if we pass a non-existing org value while enrolling a provider via the --owner flag.

[psekar]

Hello @rdimitrov I would like to contribute to this bug fix. Below is the question that i would like to get clarified before sending the fix.

We could validate if the users access token can get the organization API during provider enrollment. Incase of the API failure with 404 due to non-existing gh org, should i invoke delete provider workflow ?

Thanks for your guidance 👍