Hello there,
Check if you can get the information using the REST API. To list role assignments (list access), you can use one of the Role Assignments - List REST APIs. To refine your results, you specify a scope and an optional filter. To call the API, you must have access to the Microsoft.Authorization/roleAssignments/read operation at the specified scope. All built-in roles are granted access to this operation.
Use RBAC to manage access with the REST API https://learn.microsoft.com/en-us/rest/api/authorization/role-assignment-rest-sample
Also note 'New-AzRoleAssignment' PowerShell cmdlet is required to have 'Az.Resources' module. Refer to the following:
https://docs.microsoft.com/en-us/powershell/module/az.resources/new-azroleassignment?view=azps-4.3.0
Hope this resolves your Query !!
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