diff --git a/backend/src/schema/resolvers/inviteCodes.js b/backend/src/schema/resolvers/inviteCodes.js
index d176b7b40..91148a08d 100644
--- a/backend/src/schema/resolvers/inviteCodes.js
+++ b/backend/src/schema/resolvers/inviteCodes.js
@@ -1,4 +1,4 @@
-import generateInvieCode from './helpers/generateInviteCode'
+import generateInviteCode from './helpers/generateInviteCode'
 import Resolver from './helpers/Resolver'
 
 const uniqueInviteCode = async (session, code) => {
@@ -66,9 +66,9 @@ export default {
         user: { id: userId },
       } = context
       const session = context.driver.session()
-      let code = generateInvieCode()
+      let code = generateInviteCode()
       while (!(await uniqueInviteCode(session, code))) {
-        code = generateInvieCode()
+        code = generateInviteCode()
       }
       const writeTxResultPromise = session.writeTransaction(async (txc) => {
         const result = await txc.run(
diff --git a/backend/src/schema/types/type/InviteCode.gql b/backend/src/schema/types/type/InviteCode.gql
index e75764c1c..8ad7851a2 100644
--- a/backend/src/schema/types/type/InviteCode.gql
+++ b/backend/src/schema/types/type/InviteCode.gql
@@ -1,6 +1,6 @@
 type InviteCode {
   code: ID!
-  createdAt: String
+  createdAt: String!
   generatedBy: User @relation(name: "GENERATED", direction: "IN")
   redeemedBy: [User] @relation(name: "REDEEMED", direction: "IN")
   expiresAt: String
@@ -13,5 +13,5 @@ type Mutation {
 
 type Query {
   MyInviteCodes: [InviteCode]
-  isValidInviteCode(code: ID): Boolean
+  isValidInviteCode(code: ID!): Boolean
 }