AssemblyAI API key used for authentication.
Sent as the Authorization header value (without a prefix like "Bearer").
Obtain from https://www.assemblyai.com/dashboard/account
Optional fetchCustom fetch implementation for dependency injection in tests.
When omitted, the global fetch is used.
Optional init: RequestInitOptional init: RequestInitglobalThis.fetch
Configuration for the AssemblyAISTTProvider.
See
AssemblyAISTTProvider for usage examples