Returns an Authenticator function that returns a JwtAuth.
This is a convenience Authenticator that parses the
specified creds and delegates to the jwtAuthenticator.
Parameters
creds: Uint8Array<ArrayBufferLike>|()=>Uint8Array
the contents of a creds file or a function that returns the creds
Returns an Authenticator function that returns a JwtAuth. This is a convenience Authenticator that parses the specified creds and delegates to the jwtAuthenticator.