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##### SUMMARY
<!--- Explain the problem briefly below -->

`python-gitlab` library release a new version [v1.13.0](https://github.com/python-gitlab/python-gitlab/releases/tag/v1.13.0). User/Password authentication as been removed completely causing all Ansible GitLab module to fail... 

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->

gitlab_group
gitlab_deploy_key
gitlab_hook
gitlab_project
gitlab_project_variable
gitlab_runner
gitlab_user

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
All versions

],
        required_together=[
            ['api_username', 'api_password'],
        ],
        required_one_of=[
            ['api_username', 'api_token']
        ],
        supports_check_mode=True
    )
    api_url = module.params['api_url']
    gitlab_token = module.params['api_token']
    purge = module.params['purge']
    var_list = module.params['vars']
    state = module.params['state']
    if not HAS_GITLAB_PACKAGE:
        module.fail_json(msg=missing_required_lib("python-gitlab"), exception=GITLAB_IMP_ERR)
    try:
        gitlab_instance = gitlab.Gitlab(url=api_url, private_token=gitlab_token)
        gitlab_instance.auth()
    except (gitlab.exceptions.GitlabAuthenticationError, gitlab.exceptions.GitlabGetError) as e:
        module.fail_json(msg="Failed to connect to GitLab server: %s" % to_native(e))
    except (gitlab.exceptions.GitlabHttpError) as e:
        module.fail_json(msg="Failed to connect to GitLab server: %s. \
            GitLab remove Session API now that private tokens are removed from user API endpoints since version 10.2" % to_native(e))
    this_gitlab = GitlabProjectVariables(module=module, gitlab_instance=gitlab_instance)
    change, return_value = native_python_main(this_gitlab, purge, var_list, state)
    module.exit_json(changed=change, project_variable=return_value)
if __name__ == '__main__':
    main()