Prevent lazy initialize exception in spring security authentication object

[donggyu04]

Currently, we are using the SecuredUser object as a spring security's authentication principal.
It is used in some of our codes.

case of below, It emits lazy initialize exception(no session).
because the User object stored in SecuredUser at login time is not properly initialized the fields that require lazy fetch.

so, I changed a SecuredUser to have eager fetched user object at login time.

SecuredUser secureUser = cast(authentication.getPrincipal());
User user = secureUser.getUser();

...

// Emit lazy initialize exception (no session)
List<User> owners = user.getOwners();

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