[FA-55] Finished aside from deactivation/integration events

fictionarchive-web-astro/src/lib/graphql/mutations/inviteUser.graphql

@@ -0,0 +1,14 @@
+mutation InviteUser($input: InviteUserInput!) {
+  inviteUser(input: $input) {
+    userDto {
+      id
+      username
+      email
+    }
+    errors {
+      ... on InvalidOperationError {
+        message
+      }
+    }
+  }
+}