diff --git a/src/main/java/vercel/VercelMPIdentityProvider.java b/src/main/java/vercel/VercelMPIdentityProvider.java
index 1afedc0..dfafb3c 100755
--- a/src/main/java/vercel/VercelMPIdentityProvider.java
+++ b/src/main/java/vercel/VercelMPIdentityProvider.java
@@ -2,7 +2,6 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import jakarta.ws.rs.GET;
-import jakarta.ws.rs.POST;
 import jakarta.ws.rs.QueryParam;
 import jakarta.ws.rs.core.HttpHeaders;
 import jakarta.ws.rs.core.MediaType;
@@ -193,8 +192,6 @@ public Endpoint(RealmModel realm, AuthenticationCallback callback, EventBuilder
             this.provider = provider;
         }
 
-        // Override parent's authResponse and change annotation to @POST to be able to use @GET with another list of parameters
-        // and we need to initialize `authSession` properly.
         @GET
         @Override
         public Response authResponse(@QueryParam(AbstractOAuth2IdentityProvider.OAUTH2_PARAMETER_STATE) String state,
diff --git a/src/main/java/vercel/VercelMPUserAttributeMapper.java b/src/main/java/vercel/VercelMPUserAttributeMapper.java
new file mode 100644
index 0000000..4f4c8c1
--- /dev/null
+++ b/src/main/java/vercel/VercelMPUserAttributeMapper.java
@@ -0,0 +1,23 @@
+package vercel;
+
+import org.keycloak.broker.oidc.mappers.UserAttributeMapper;
+
+/**
+ * User attribute mapper.
+ *
+ */
+public class VercelMPUserAttributeMapper extends UserAttributeMapper {
+
+	private static final String[] cp = new String[] { VercelMPIdentityProviderFactory.PROVIDER_ID };
+
+	@Override
+	public String[] getCompatibleProviders() {
+		return cp;
+	}
+
+	@Override
+	public String getId() {
+		return "vercelmp-user-attribute-mapper";
+	}
+
+}
diff --git a/src/main/resources/META-INF/services/org.keycloak.broker.provider.IdentityProviderMapper b/src/main/resources/META-INF/services/org.keycloak.broker.provider.IdentityProviderMapper
new file mode 100755
index 0000000..ac6d232
--- /dev/null
+++ b/src/main/resources/META-INF/services/org.keycloak.broker.provider.IdentityProviderMapper
@@ -0,0 +1 @@
+vercel.VercelMPUserAttributeMapper