Greetings!!! Thank you for the response and the update.
If there is no username and password available. The only option is to perform a factory reset of the Access Points. Please follow the below process to factory reset your APs to configure them with a new username and password and a new Wi-Fi SSID/Network.
IMPORTANT NOTE: To perform a factory reset correctly on one of the access points, you must disconnect the rest of your other access points from the "ICX-7150-switch". For example, if you have 3 access points, you should go to the switch and disconnect 2 of the cables to turn off the "2 access points" and only leave 1 connected with which we are going to work the factory reset once you configure the access point and make sure all is good, go ahead and reconnect the other Access Points back.