Unable to use SessionConfig about ussd-menu-builder HOT 1 OPEN

you have to declare a variable called "sessions" before you can used session config

Example:
let sessions = {};
menu.sessionConfig({
start: (sessionId, callback) => {
// initialize current session if it doesn't exist
// this is called by menu.run()
if (!(sessionId in sessions)) sessions[sessionId] = {};
callback();
},
end: (sessionId, callback) => {
// clear current session
// this is called by menu.end()
delete sessions[sessionId];
callback();
},
set: (sessionId, key, value, callback) => {
// store key-value pair in current session
sessions[sessionId][key] = value;
callback();
},
get: (sessionId, key, callback) => {
// retrieve value by key in current session
let value = sessions[sessionId][key];
callback(null, value);
}
});

from ussd-menu-builder.