reject with unknow reason if failed to send confirmation email

packages/api/src/services/create_user.ts

@@ -99,12 +99,16 @@ export const createUser = async (input: {
     const confirmationToken = generateVerificationToken(user.id)
     const confirmationLink = `${env.client.url}/confirm-email/${confirmationToken}`
     // send email
-    await sendEmail({
+    const sent = await sendEmail({
       from: env.sender.message,
       to: user.email,
       subject: 'Confirm your email',
       text: `Please confirm your email by clicking the link below:\n\n${confirmationLink}\n\n`,
     })
+
+    if (!sent) {
+      return Promise.reject({ errorCode: SignupErrorCode.Unknown })
+    }
   }
 
   return [user, profile]