Added error handling; Made querystring helper

client/mixins/apiRequestHelpers.js

@@ -0,0 +1,12 @@
+export default {
+  methods: {
+    buildQuerystring(obj, opts = { includePrefix: false }) {
+      let querystring = Object
+        .entries(obj)
+        .map(([key, val]) => `${encodeURIComponent(key)}=${encodeURIComponent(val)}`)
+        .join('&')
+
+      return (opts.includePrefix ? '?' : '').concat(querystring)
+    }
+  }
+}