objective c - Set parameter headers calling REST -

must set parameters in rest calls authentication. use code

nsmutabledictionary *parameters = [nsmutabledictionary dictionary];      parameters[@"nst_code"] = nst_code;     parameters[@"nst_id"] = [[nsuserdefaults standarduserdefaults] objectforkey:@"nst_id"];     parameters[@"api_key"] = [[nsuserdefaults standarduserdefaults] objectforkey:@"api_key"]; 

as indication?