Fix user_agent string not getting set (#66914)

changelogs/fragments/66914-purefa_user_string.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+ - pure - fix incorrect user_string setting in module_utils file (https://github.com/ansible/ansible/pull/66914)

lib/ansible/module_utils/pure.py

@@ -90,7 +90,8 @@ def get_blade(module):
         blade.disable_verify_ssl()
         try:
             blade.login(api)
-            if API_AGENT_VERSION in blade.api_version.list_versions().versions:
+            versions = blade.api_version.list_versions().versions
+            if API_AGENT_VERSION in versions:
                 blade._api_client.user_agent = user_agent
         except rest.ApiException as e:
             module.fail_json(msg="Pure Storage FlashBlade authentication failed. Check your credentials")
@@ -99,7 +100,8 @@ def get_blade(module):
         blade.disable_verify_ssl()
         try:
             blade.login(environ.get('PUREFB_API'))
-            if API_AGENT_VERSION in blade.api_version.list_versions().versions:
+            versions = blade.api_version.list_versions().versions
+            if API_AGENT_VERSION in versions:
                 blade._api_client.user_agent = user_agent
         except rest.ApiException as e:
             module.fail_json(msg="Pure Storage FlashBlade authentication failed. Check your credentials")