When you run the following command using Acquia CLI it gives an error:
The error that is returned is :
Cloud Platform API returned an error: The application you are trying to access does not exist, or you do not have permission to access it.
If you have the same SSH key is being added to 2 different Acquia Cloud accounts, and if those 2 accounts have access to the same subscription, then there will be an issue in accessing using the Acquia Cloud Platform API.
To resolve this ensure that each of the Acquia Cloud accounts has two different SSH keys.