we try to obtain an access token using the Authorization Code Grant, which is described here:
Currently, we fail between step 5 and 6. The authorization screen is shown to us, after logging in the user's permission are not sufficient to grant the access (see image below).
I should note, that two different user accounts were involved:
Is this scenario possible or is it necessary to use the same user account for both tasks?If it is possible, what can I do to make it work in the sandbox?
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