Refactor kredits setup code a bit

app/routes/application.js

@@ -7,14 +7,12 @@ export default class ApplicationRoute extends Route {
   @service communityFunds;
 
   beforeModel(/* transition */) {
-    const kredits = this.kredits;
+    return this.kredits.setup().then(() => {
-
+      this.kredits.kredits.preflightChecks().catch(error => {
-    return kredits.setup().then(() => {
-      kredits.kredits.preflightChecks().catch((error) => {
         console.error('Kredits preflight check failed!');
         console.error(error);
       });
-    }).catch((error) => {
+    }).catch(error => {
       console.log('Error initializing Kredits', error);
     });
   }

app/services/kredits.js

@@ -111,28 +111,23 @@ export default Service.extend({
     });
   },
 
-  setup () {
+  async setup () {
-    return this.getEthProvider().then((providerAndSigner) => {
+    const kredits = await this.getEthProvider().then((providerAndSigner) => {
-      let kredits = new Kredits(providerAndSigner.ethProvider, providerAndSigner.ethSigner, {
+      return new Kredits(providerAndSigner.ethProvider, providerAndSigner.ethSigner, {
-        addresses: { Kernel: config.kreditsKernelAddress },
-        apm: config.kreditsApmDomain,
         ipfsConfig: config.ipfs
+      }).init();
     });
-      return kredits
+
-        .init()
-        .then(async (kredits) => {
     this.set('kredits', kredits);
     this.set('currentBlock', await kredits.provider.getBlockNumber());
 
     if (this.currentUserAccounts && this.currentUserAccounts.length > 0) {
-            this.getCurrentUser.then((contributorData) => {
+      this.getCurrentUser.then(contributorData => {
         this.set('currentUser', contributorData);
       });
     }
 
     return kredits;
-        });
-    });
   },
 
   getCurrentUser: computed('kredits.provider', 'currentUserAccounts.[]', function() {