[tcgc] Verify different ways to authenticate in same package work

[iscai-msft]

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In the Messaging package we have 4 clients, can 3 of the clients be using ApiKeyAuth and 1 of the client uses BearerAuth with ACS token? If so how can this be achieved with TypeSpec?

I tried doing it like thus and another @useAuth(BeareAuthr) on the client that uses ACS token, but does not seem to work.

Want to verify that this works in tcgc. If it doesn't work, will fix

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