While configuring service principle for azure IPI installation. The documentation provides incomplete command for adding "contributor" role to Service Principle.

[1] https://docs.openshift.com/container-platform/4.14/installing/installing_azure/installing-azure-account.html#:~:text=If%20you%20applied%20the%20Contributor%20role

The command gives the following output.

$ az role assignment create --role "User Access Administrator" --assignee-object-id $(az ad sp show --id xxxx-xxxxx-xxxxx-xxxx --query id -o tsv) 

the following arguments are required: --scope
Examples from AI knowledge base:az role assignment create --assignee sp_name --role a_roleCreate role assignment for an assignee.
az role assignment create --assignee 00000000-0000-0000-0000-000000000000 --role "Storage Account Key Operator Service Role" --scope $idCreate a new role assignment for a user, group, or service principal. (autogenerated)
https://docs.microsoft.com/en-US/cli/azure/role/assignment#az_role_assignment_createRead more about the command in reference docs    

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Command fails to complete

contributor role should be added to SP