Hey can anyone help me wit this..is it ok to give my server username and pword to freelancer .?

hello, i am outsourcing my e commerce store site..now he is asking for my server information and evrything..is it ok..can u help me which information should i give them only so he cant cheat me. also, he said he will work in my server..so please let me know can let him work on my server and which information only, i should give him?