Disable vault setting if vaulting feature is not available in access token

modules/ppcp-api-client/src/Entity/class-token.php

@@ -99,6 +99,22 @@ class Token {
 		return new Token( $json );
 	}
 
+	/**
+	 * Checks if vaulting is available in access token scope.
+	 *
+	 * @return bool Whether vaulting features are enabled or not.
+	 */
+	public function vaulting_available() {
+		if ( strpos(
+			$this->json->scope,
+			'https://uri.paypal.com/services/vault/payment-tokens/readwrite'
+		) !== false ) {
+			return true;
+		}
+
+		return false;
+	}
+
 	/**
 	 * Validates whether a JSON object can be transformed to a Token object.
 	 *