I'm fiddeling arround with the REST API and would like to autenticate my customers against ISPConfig (prior to letting them order stuff). I've looked at https://git.ispconfig.org/ispconfig/ispconfig3/tree/ispconfig-3.0.5/remoting_client/examples but couldn't find a client_login function. So I guess I will need to use client_get_by_username and compare the hashed password against what the user gave me. What I also noticed is that when posting my session_id to json.php?get_function_list I allways get a "message": "You do not have the permissions to access this function." Any help would be appreciated.