Dear Seonho Cha,
Sorry my mistake, it's under Resources
Check Permissions from above snapshot,
and then set Runtime Permissions:
Try to type "CreateThing" under "Property, Service or Event Overrides" Tab, and set Service Execute(Green button) permission for the user you want to give permission to.
In case you will need to call other Services under EntityServices in future, you could set permission for all property read, write, service execute, etc. in the beginning of the set permission page(See my snapshot Run time above).
Hi seonho Cha,
Running a Service/Snippet requires RunTime Permission.
Please follow following Steps to resolve this issue.
1. Navigate to Composer -> System -> Resources.
2. Locate the EntityServices and check the checkbox. Click on Permissions button on the Top.
3. Go to RunTime.
4. In Property, Service or Event Overrides, type in CreateThing.
5. Then under CreateThing Service add your user/user_group and click on allow to give the Service Execute rights to the user/user_group.
You may want to add RunTime permission for other Services in EntityServices based on your requirement.
I hope it helps.