How to get data from springboot and compare it?

I have made a project where user first register and using the same email and password it will login which will generate a random string and it will be sent to user mail id and also it will be stored in database. Now, I have to validate the user input OTP(random string) with the OTP stored in database to check if user is putting the OTP correct. For that I have written some logic but everytime I check it shows invalid OTP. Here is my code :

OTPMailContoller class :

@PostMapping("/validate-otp")
    public SessionHandling validateOtp(@RequestBody SessionHandling otp) throws Exception{
    
    String tempOtp = otp.getOneTimePassword();
    
    SessionHandling UserOtp = null;
    
    if(tempOtp != null) {
    UserOtp = emailService.fetchUserByOneTimePassword(tempOtp);
    }
    if(UserOtp == null){
        throw new Exception("invalid otp !!!");
    }
    return UserOtp;
    }

Service class :

public SessionHandling fetchUserByOneTimePassword(String tempOtp) {
        return repo.findByOneTimePassword(tempOtp);
    }

Repository class :

 @Query(value = "select * from session_handling where one_time_password= :otp", nativeQuery =true)
    public SessionHandling findByOneTimePassword(@Param("otp")String tempOtp);

Model class :

    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    private String name;
    private String email;
    private String password;
    private String cpassword;
    
    private static final long OTP_VALID_DURATION = 5 * 60 * 1000;   // 5 minutes
    
    @Column(name = "one_time_password")
    private String oneTimePassword;

Error :

Invalid otp !!!