Should username for a tenant-specific user include a tenant_id discriminator?

[rg1_]

I would expect tenant-specific usernames to be unique only within that specific tenant. Currently, the tenant-specific username must be unique across the entire system. Is this the expected behavior?

[Thomas_Roger]

Yes, this is the expected behavior. The username must be unique in the whole DB (as all the tenants are stored in the same DB).