implement JSON to dataStore
change iterator to for loop

update imported package, change methods accordingly
add exceptions
update JSON exception
revert back temporarily
Revert "update JSON exception"

This reverts commit befe0442e48681372aff8d4150881fd9820fafd7.
Revert "Revert "update JSON exception""

This reverts commit f752358eafb81136da4b77e1cb13975cf88268b3.
Revert "delete unnecessary imported package"

This reverts commit 2f303328739f2a1fe155b828751b1d5aba8dfa2f.
Revert "Revert "delete unnecessary imported package""

This reverts commit 61c00b1c608c1816ea3956778cf694774f9828c6.
add JSON to the project