1. Login as administrator into the Oracle Cloud Infrastructure console.
2. Under Governance and Administration section, go to Identity → Groups option and click on Create Group button.
3. Create a new group with the required group name (say 'AppManager') and add the required user to this newly-created group.
4. Under Identity → Policy option, click on Create Policy button and create a new policy with the following policy statement:
Example:
ALLOW GROUP AppManager to use all-resources IN TENANCY
Note: Make sure that you are in the 'root' compartment while creating the above policy.