Is username should be same in OIC,CPQ and Fusion for installing CPQ Fusion Bridge accelerator?

Summary:

We are in the process of implementing CPQ Fusion Bridge business accelerator primarily to use OIC prebuilt adaptors across CPQ-FOM-SMC. Do we need to use 'same' username with admin privilege in OIC and CPQ and Fusion for installing CPQ Fusion Bridge accelerator? Is this because of creating trust relationship between IDCS across SaaS Clouds? Kindly help on this, this is urgent

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