bitcoin-cli importprivkey to the same user or different users If i call the bitcoin-cli importprivkey multiple times, does it import the private key to the same user or to different users? In the bitcoin-cli importprivkey, it does not specify to which user account is the key importing to.
You can set account like that

bitcoin-cli importprivkey "myPrivKey" "Account" true


if you want to import multi private keys do it like that

bitcoin-cli importprivkey "myPrivKey" "Account" false
bitcoin-cli importprivkey "myPrivKey" "Account" false
bitcoin-cli importprivkey "myPrivKey" "Account" false
bitcoin-cli importprivkey "myPrivKey" "Account" true


So you don't rescan the entire local block database each time, but the last time.

to import it to default account leave it empty 

bitcoin-cli importprivkey "myPrivKey" "" true


Also please consider stopping using accounts since it will be removed in 0.16 version.