Lost admin password e400

I lost the admin password from one of my e400 theres is a way to recover ? or a way to access

Have you onboarded the E400 into cnMaestro? You might be able to push out a config change to it and change the password this way. If you haven't onboarded it, you will have to reset to factory defaults. by pressing down the reset tab on the Access Point for about 10 seconds until the AP reboots  should indicate by the power LED changing color from Green to Orange.