Handling

Provider all the error codes of the system.

ID	Description
400	An invalid parameter was passed.
401	A method that requires an access token was called without one.
403	A method which requires certain permissions was called with an access token that lacks those permissions.
404	An attempt was made to call a method that does not exist. Note, calling methods that expect numeric ids (like /lessons/{id}) with non-numeric ids can also result in this error. Data not found