Move publishableKey check from initializer to service configure method

Author: josemarluedke

addon/services/stripev3.js

@@ -62,6 +62,9 @@ export default Service.extend({
     if (!didConfigure) {
       let publishableKey = this.get('publishableKey');
 
+      if (!publishableKey) {
+        throw new Error("stripev3: Missing Stripe key, please set `ENV.stripe.publishableKey` in config.environment.js");
+      }
 
       let stripe = new Stripe(publishableKey);
       let functions = getProperties(stripe, STRIPE_FUNCTIONS);

app/initializers/ember-stripe-elements.js

@@ -1,4 +1,3 @@
-import EmberError from '@ember/error';
 import config from '../config/environment';
 import StripeMock from 'ember-stripe-elements/utils/stripe-mock';
 
@@ -9,10 +8,6 @@ export function initialize() {
   application.register('config:stripe', stripeConfig, { instantiate: false });
   application.inject('service:stripev3', 'config', 'config:stripe');
 
-  if (!stripeConfig.publishableKey) {
-    throw new EmberError("stripev3: Missing Stripe key, please set `ENV.stripe.publishableKey` in config.environment.js");
-  }
-
   if (typeof FastBoot !== 'undefined' || stripeConfig.mock) {
     window.Stripe = StripeMock;
   }