get Real Customers: fix findByActive

src/main/kotlin/com/aitrainer/api/service/CustomerService.kt

@@ -5,6 +5,6 @@ import org.springframework.data.jpa.repository.Query
 import org.springframework.data.repository.query.Param
 
 interface CustomerService {
-    @Query("FROM customer WHERE active = :active")
-    fun findRealCustomers(@Param("active") active: String): List<Customer>
+    @Query("FROM customer WHERE active = :active ")
+    fun findByActive(@Param("active") active: String? ): List<Customer>
 }