public function getTokenFromRequest( RequestInterface $request ) {
		if ( $request->get( $this->key ) ) {
			return $request->get( $this->key );
		}

		if ( $request->post( $this->key ) ) {
			return $request->post( $this->key );
		}

		if ( $request->headers( $this->header ) ) {
			return $request->headers( $this->header );
		}

		return '';
	}