How to block or prevent the drop all , drop data and drop predicate in dgraph alpha and ratel

how to block or prevent the drop all , drop data and drop predicate in dgraph alpha and ratel

using – limit how to prevent the drop all , drop data and drop predicate ?

and how to prevent the drop all in ratel

https://dgraph.io/docs/deploy/cli-command-reference/

ExecStart=/usr/local/bin/dgraph alpha --my=xxx.xxx.x.28:7080 --zero=xxx.xxx.x.27:5080 --logtostderr -v=2 -p /var/lib/dgraph/p -w /var/lib/dgraph/w --port_offset=8180

drop operation are available through the /alter endpoint, on-prem you can configure Dgraph to only allow alter operations when the client provides a specific token: see
https://dgraph.io/docs/deploy/admin/dgraph-administration/#secure-alter-operations