Handle session expirations and 401 error codes. The following code will be activated if the API responds with a 401 (no authentication). If there’s a token that should be renewed, we first renew the token and if this is successful we try the original request again.

With this snippet you can easily and quickly mock an API during developmentby placing JSON files in your res/raw/ folder. This comes in handy when the actual API does not exist yet.

Global error handling for REST requests.