Write a function that accepts a $2-$dimensional numpy Jarray. The function should:

Validate that the $2-$dimensional array is a square. Return $-1$ if it is not.

You can assume the $2-$dimensional array is numeric. Return a tuple with two elements, which are the sums of the two diagonals.

Make your function size insensitive, it can be $33,$ or $44,$dots nxn matrix.