Lately I've increasingly been running into token expiration errors caused by the not before / issued at being before the server clock time. This PR implements the same leeway as for token expiration for the not before / issued at fields. This seems like a safe approach that Shopify also implements in their official PHP package.
Lately I've increasingly been running into token expiration errors caused by the not before / issued at being before the server clock time. This PR implements the same leeway as for token expiration for the not before / issued at fields. This seems like a safe approach that Shopify also implements in their official PHP package.