Fix call to `axapi_call_v3()` (#17637)

Closes #17584

lib/ansible/module_utils/a10.py

@@ -91,7 +91,7 @@ def axapi_authenticate(module, base_url, username, password):
 def axapi_authenticate_v3(module, base_url, username, password):
     url = base_url
     auth_payload = {"credentials": {"username": username, "password": password}}
-    result = axapi_call_v3(module, url, post=auth_payload)
+    result = axapi_call_v3(module, url, method='POST', body=auth_payload)
     if axapi_failure(result):
         return module.fail_json(msg=result['response']['err']['msg'])
     signature = result['authresponse']['signature']
@@ -141,4 +141,3 @@ def axapi_get_port_protocol(protocol):
 
 def axapi_get_vport_protocol(protocol):
     return AXAPI_VPORT_PROTOCOLS.get(protocol.lower(), None)
-