I always take lots of information and tips for JIRA.
Thank you for everyone 
Actually I'm not developer so my question might be unclealy to give me answer.
JIRA system interface to another system now using REST API
1) How to search all projects related in spefic user when we call REST API with ADMIN account.
2) Could I list up all projects in registered in JIRA system without ADMIN account.
I hope you are doing well.
Have a good day.