feat: verify if user's email is disposable on sign up (#117)

* fix: Corrected "Stuffs" to "Stuff" on the landing page

* fix: Corrected "Stuffs" to "Stuff" on the landing page

* fix: Corrected Success Messages on the dashbaord

* feat: Added Verification to check disposable emails

* Update apps/dashboard/src/routes/signup/+page.svelte

Co-authored-by: Rotimi Best <best@classroomio.com>

* Update apps/dashboard/src/routes/signup/+page.svelte

Co-authored-by: Rotimi Best <best@classroomio.com>

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/dashboard/src/routes/signup/+page.svelte

@@ -14,6 +14,7 @@
   import { profile } from '$lib/utils/store/user';
   import { currentOrg } from '$lib/utils/store/org';
   import { capturePosthogEvent } from '$lib/utils/services/posthog';
+  import { snackbar } from '$lib/components/Snackbar/store';
 
   let supabase = getSupabase();
   let fields = Object.assign({}, SIGNUP_FIELDS);
@@ -43,6 +44,21 @@
     try {
       loading = true;
 
+      // Check if the email address is disposable
+      const emailCheck = await fetch('https://is-disposable-email.ephraimduncan68.workers.dev/', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({ email: fields.email })
+      });
+      const emailCheckResponse = await emailCheck.json();
+
+      if (emailCheckResponse.isDisposable === true) {
+        snackbar.error('The email you provided is disposable');
+        return;
+      }
+
       const {
         data: { session },
         error