fix another issue with unset credentials (fix #84)

Author: superstes

src/ansibleguy-webui/aw/execute/play_credentials.py

@@ -91,19 +91,20 @@ def get_credentials_to_use(job: Job, execution: JobExecution) -> (BaseJobCredent
 def get_runner_credential_args(creds: BaseJobCredentials) -> dict:
     args = {}
 
-    if is_set(creds.ssh_key):
-        args['ssh_key'] = creds.ssh_key
+    if is_set(creds):
+        if is_set(creds.ssh_key):
+            args['ssh_key'] = creds.ssh_key
 
-    if is_set(creds.connect_pass) or is_set(creds.become_pass) or is_set(creds.vault_pass):
-        args['passwords'] = {}
+        if is_set(creds.connect_pass) or is_set(creds.become_pass) or is_set(creds.vault_pass):
+            args['passwords'] = {}
 
-        if is_set(creds.connect_pass):
-            args['passwords'][r'^SSH\s[pP]assword:\s*$'] = creds.connect_pass
+            if is_set(creds.connect_pass):
+                args['passwords'][r'^SSH\s[pP]assword:\s*$'] = creds.connect_pass
 
-        if is_set(creds.become_pass):
-            args['passwords'][r'^BECOME\s[pP]assword:\s*$'] = creds.become_pass
+            if is_set(creds.become_pass):
+                args['passwords'][r'^BECOME\s[pP]assword:\s*$'] = creds.become_pass
 
-        if is_set(creds.vault_pass):
-            args['passwords'][r'^Vault\s[pP]assword:\s*$'] = creds.vault_pass
+            if is_set(creds.vault_pass):
+                args['passwords'][r'^Vault\s[pP]assword:\s*$'] = creds.vault_pass
 
     return args