adapters/crate: Fix inviteOwner() error handling code

Author: Turbo87

app/adapters/crate.js

@@ -5,12 +5,18 @@ export default ApplicationAdapter.extend({
     return this.ajax(this.urlForFollowAction(id), 'PUT');
   },
 
-  inviteOwner(id, username) {
-    return this.ajax(this.urlForOwnerAction(id), 'PUT', {
+  async inviteOwner(id, username) {
+    let result = await this.ajax(this.urlForOwnerAction(id), 'PUT', {
       data: {
         owners: [username],
       },
     });
+
+    if (result.ok) {
+      return result;
+    } else {
+      throw result;
+    }
   },
 
   removeOwner(id, username) {

tests/acceptance/crate-test.js

@@ -281,7 +281,9 @@ module('Acceptance | crate page', function (hooks) {
     await fillIn('input[name="username"]', 'spookyghostboo');
     await click('[data-test-save-button]');
 
-    assert.dom('[data-test-error-message]').hasText('Error sending invite: Not Found');
+    assert
+      .dom('[data-test-error-message]')
+      .hasText('Error sending invite: could not find user with login `spookyghostboo`');
     assert.dom('[data-test-owners] [data-test-owner-team]').exists({ count: 2 });
     assert.dom('[data-test-owners] [data-test-owner-user]').exists({ count: 2 });
   });