Feature flag does not work

we want to `enable/disable`  graphql api on starting instance. 
Here is the configuration on `application.properties`:
```
spring.graphql.jpa.query.path=graphql
spring.graphql.jpa.query.useDistinctParameter=true
spring.graphql.jpa.query.enabled=false
```
but this does not work properly. Is there any kind of other configuration needed?