WiFi Access Points with Maker plan

My devices need to connect to different wifi networks without a preconfigured Secret ssid & pass. I am currently prototyping with WiFi Manager and an Arduino Cloud FREE account. Do the free accounts not have the ability to connect to non predetermined access points?
The only thing that I have tried is leaving the SSID & PASS blank in the thingProperties.h tab.
The device connects to the wifi network using the Wifi Manager Access Point but not to Arduino IoT Cloud.
Do I need to upgrade my account for this to work?

const char SSID[]  = " "; 
const char PASS[]  = " ";