code: def an_access_token():
      return jwt.encode(
          {
              "exp": time.time(),
              "azp": a_string(),
              "iss": "http://{}.com".format(a_string()),
          },
          SECRET,
      )
  
imports: import time
  import jwt
  from tests.unit.neptune.legacy.random_utils import a_string
label_desc: Use image node_id 1 for calling a global function with example usage: an_access_token() and returns: jwt