index: drastically improve error handling / messages for `create`

lib/index.js

@@ -203,18 +203,24 @@ export default class Now extends EventEmitter {
       if (this._debug) console.timeEnd('> [debug] /now/create');
 
       // no retry on 4xx
-      if (200 !== res.status && (400 <= res.status && 500 > res.status)) {
-        if (this._debug) {
-          console.log('> [debug] bailing on creating due to %s', res.status);
-        }
-        return bail(responseError(res));
+      let body;
+      try {
+        body = await res.json();
+      } catch (err) {
+        throw new Error('Unexpected response');
       }
 
-      if (200 !== res.status) {
-        throw new Error('Deployment initialization failed');
+      if (429 === res.status) {
+        return bail(responseError(res));
+      } else if (res.status >= 400 && res.status < 500) {
+        const err = new Error(body.error.message);
+        err.userError = true;
+        return bail(err);
+      } else if (200 !== res.status) {
+        throw new Error(body.error.message);
       }
 
-      return res.json();
+      return body;
     });
 
     // we report about files whose sizes are too big