errors.map is not a function

[classical-bit]

graphql-client/index.js

Line 2 in f8d1dcb

var locations = errors.map(function (e) { return e.locations })

I understand by convention errors should be an array. But let's take this example when shopify for invalid access-token returns response as

{
    "errors": "[API] Invalid API key or access token (unrecognized login or wrong password)"
}

can we to a type check and handle this problem?