input: Write a python function to check if JIRA_API_USER_NAME and JIRA_API_USER_PASSWORD environment variables are set.
  assert check_jira_env_vars() == False  # Assuming the variables are not set
  os.environ["JIRA_API_USER_NAME"] = "user"
  os.environ["JIRA_API_USER_PASSWORD"] = "password"
  assert check_jira_env_vars() == True
output: import os
  
  def check_jira_env_vars():
      return os.getenv("JIRA_API_USER_NAME") is not None and os.getenv("JIRA_API_USER_PASSWORD") is not None