diff --git a/src/models.rs b/src/models.rs
index cdaa220..e1c0b2f 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -346,6 +346,7 @@ pub(crate) struct LoginWithEmailOtpPayload<'a> {
     pub(crate) options: Option<LoginEmailOtpParams>,
 }
 
+// align json field's name with https://github.com/supabase/auth/blob/1f7de6c65f31ef0bbb80899369989b13ab5a517f/openapi.yaml#L559
 #[derive(Default, Debug, Clone, Serialize, Deserialize, PartialEq)]
 pub struct LoginEmailOtpParams {
     /// Verification token received when the user completes the captcha on the site.
@@ -355,9 +356,11 @@ pub struct LoginEmailOtpParams {
     /// The redirect url embedded in the email link
     pub email_redirect_to: Option<String>,
     /// If set to false, this method will not create a new user. Defaults to true.
+    #[serde(rename = "create_user")]
     pub should_create_user: Option<bool>,
 }
 
+// align json field's name with https://github.com/supabase/auth/blob/1f7de6c65f31ef0bbb80899369989b13ab5a517f/openapi.yaml#L559
 #[derive(Default, Debug, Clone, Serialize, Deserialize, PartialEq)]
 pub struct LoginMobileOtpParams {
     /// Verification token received when the user completes the captcha on the site.
@@ -367,6 +370,7 @@ pub struct LoginMobileOtpParams {
     /// The redirect url embedded in the email link
     pub channel: Option<Channel>,
     /// If set to false, this method will not create a new user. Defaults to true.
+    #[serde(rename = "create_user")]
     pub should_create_user: Option<bool>,
 }
 
diff --git a/tests/client_tests.rs b/tests/client_tests.rs
index bd41ab3..dc569ef 100644
--- a/tests/client_tests.rs
+++ b/tests/client_tests.rs
@@ -150,6 +150,40 @@ async fn send_email_with_otp() {
     assert!(response.is_ok())
 }
 
+#[tokio::test]
+async fn send_email_with_otp_with_create_user_false() {
+    let auth_client = create_test_client();
+
+    let uuid = uuid::Uuid::now_v7();
+
+    let demo_email = format!("signup__{}@demo.com", uuid);
+
+    let data = serde_json::json!({
+        "otp": format!("test" )
+    });
+
+    let options = LoginEmailOtpParams {
+        data: Some(data),
+        should_create_user: Some(false),
+        ..Default::default()
+    };
+
+    let response = auth_client
+        .send_email_with_otp(&demo_email, Some(options))
+        .await;
+
+    // Wait to prevent running into Supabase rate limits when running cargo test
+    let one_minute = time::Duration::from_secs(60);
+    thread::sleep(one_minute);
+
+    if let Err(Error::AuthError{status, message}) = response {
+        assert_eq!(status.as_u16(), 422);
+        assert!(message.contains("not allowed for otp"));
+    } else {
+        assert!(false, "Expected AuthError, got other response");
+    }
+}
+
 #[test]
 fn login_with_oauth_test() {
     let auth_client = create_test_client();