UnsatisfiedDependencyException: Error creating bean with name 'customerController': Unsatisfied dependency expressed through field 'customerService'

Question

I want customer details by using emailId otherwise I want email not found ,but I'm getting dependency error. Anyone help to sort out of this issue.

Controller

 1.         @GetMapping("/get/{email}")
            public Customer getCustomerByEmail(@PathVariable String email) {
            return customerService.findByEmail(email);
    }
       }

CustomerServiceImp

 2.  @Override
    public Customer findByEmail(String email) {
        Optional<Customer> customer = customerRepository.findByEmail(email);
        if (customer.isPresent()) {
            return customer.get();

        }else{
            throw new RuntimeException("Customer is not Found"+email);
        }
    } 

Repo

 3. @Repository
              
                  
     public interface CustomerRepository extends JpaRepository<Customer, Integer> {
   
       Optional<Customer> findByEmail(String email);
    

CustomerService

Customer findByEmail(String email);