Cisco Firepower Management Center - 608 - Added troubleshooting infor…

…mation to the help.md (#2219)

plugins/cisco_firepower_management_center/help.md

@@ -707,7 +707,8 @@ Example output:
 
 ## Troubleshooting
 
-*There is no troubleshooting for this plugin.*
+* The certificate authentication is used solely in two actions, namely: `Add Scan Result` and `Bulk Add Scan Result`. Please remember, that the data entered into the certificate input field in the connection is required to be a base-64 encoded PKCS12 certificate file, exported from the Firepower Management Center server. The passphrase is a password created during the PKCS12 certificate file export.
+* `SSL Verify` field is used by all other actions (i.e. excluding `Add Scan Result` and `Bulk Add Scan Result`), for SSL certificate verification. If the certificate is self-signed then SSL Verify should be set to `False` for those actions.
 
 # Version History
 

plugins/cisco_firepower_management_center/icon_cisco_firepower_management_center/connection/connection.py

@@ -28,7 +28,7 @@ def connect(self, params):
         self.password = password
         self.host = params.get(Input.SERVER)
         self.certificate = params.get(Input.CERTIFICATE)
-        self.passphrase = params.get(Input.CERTIFICATE_PASSPHRASE).get("secretKey")
+        self.passphrase = params.get(Input.CERTIFICATE_PASSPHRASE, {}).get("secretKey")
 
         self.cisco_firepower_api = CiscoFirePowerApi(
             username=username,