token_and_options

Parses the token and options out of the token authorization header. If the header looks like this:

Authorization: Token token="abc", nonce="def"

Then the returned token is âabcâ, and the options is {nonce: âdefâ}

request - ActionDispatch::Request instance with the current headers.

Returns an Array of [String, Hash] if a token is present. Returns nil if no token is found.