socket.emit('getDoctors');
socket.on('doctors', function( username ) {

});
socket.emit('schedule', {user_id: doctorId, ime: ime, mobile: mob, msg: message});
socket.on('scheduled', function() {

});
socket.emit('getAppointments', user_id);
socket.on('appointments', function( data ) {
    app_id, name, mobile, msg
});
socket.emit('removeAppointments', app_id);
socket.on('appRemoved', function() {

});