diff --git a/src/classes/Auth/Auth.ts b/src/classes/Auth/Auth.ts
index b9358b4..c6663bb 100644
--- a/src/classes/Auth/Auth.ts
+++ b/src/classes/Auth/Auth.ts
@@ -83,8 +83,10 @@ export class Auth extends PassageBase {
         try {
             const { language, magicLinkPath, redirectUrl, ttl } = options ?? {};
 
+            let userId: string | undefined = undefined;
             let channel: MagicLinkChannel;
             if ('userId' in args) {
+                userId = args.userId;
                 channel = args.channel;
             } else if ('email' in args) {
                 channel = MagicLinkChannel.Email;
@@ -96,11 +98,13 @@ export class Auth extends PassageBase {
                 appId: this.config.appId,
                 createMagicLinkRequest: {
                     ...args,
+                    // eslint-disable-next-line camelcase
+                    user_id: userId,
+                    channel,
                     language,
                     magic_link_path: magicLinkPath,
                     redirect_url: redirectUrl,
                     ttl,
-                    channel,
                 },
             });