Hi ,
When using getNetworkWirelessSsids ( https://developer.cisco.com/meraki/api-latest/#!get-network-wireless-ssids) I can list all my SSIDs in a specific network. My SSID #2 returns :
{"number":2,"name":"XXXX","enabled":true,"splashPage":"None","ssidAdminAccessible":false,"authMode":
"ipsk-without-radius" ...}
Then I can simply use the getNetworkWirelessSsidIdentityPsks endpoint ( https://developer.cisco.com/meraki/api-latest/#!get-network-wireless-ssid-identity-psks ) which successfully retrieves the psks :
[{"id":"X","name":"X","groupPolicyId":114,"passphrase":"X"},{"id":"X","name":"X","groupPolicyId":113,"passphrase":"X"},]
Hope that helps !