#378 Check message prop instead of errorMessage

[ghost]

Check message property instead of errorMessage in apiError function to return correct error message from API.

[ghost]

Based on @pkarw suggestion I updated message check for both message and errorMessage properties.
BWT: Function parameter code never gets used, should it be used somehow? Maybe in the same way as message:

const resultCode = errorObj.code ? errorObj.code : (code ? code : 500);

[pkarw]

Thanks! Good point regarding the code parameter - it should be used as a default value (instead of 500) in the line 88

Thanks!