useCommunicationAdapter.tsx

const callAdapterArgs = useMemo(() => { 
  if (userId && credential && displayName && teamsMeetingLink) { 
    return { 
      userId: fromFlatCommunicationIdentifier(userId)  
               as CommunicationUserIdentifier, 
      displayName, 
      credential, 
      locator: { meetingLink: teamsMeetingLink }, 
    } 
  } 

  return {}; 
}, [userId, credential, displayName, teamsMeetingLink]);  

const callAdapter = useAzureCommunicationCallAdapter(callAdapterArgs);