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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

try:
        gitlab_instance = gitlab.Gitlab(url=gitlab_url, ssl_verify=validate_certs, email=gitlab_user, password=gitlab_password,
                                        private_token=gitlab_token, api_version=4)
        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))
    gitlab_deploy_key = GitLabDeployKey(module, gitlab_instance)
    project = findProject(gitlab_instance, project_identifier)
    if project is None:
        module.fail_json(msg="Failed to create deploy key: project %s doesn't exists" % project_identifier)
    deployKey_exists = gitlab_deploy_key.existsDeployKey(project, key_title)
    if state == 'absent':
        if deployKey_exists:
            gitlab_deploy_key.deleteDeployKey()
            module.exit_json(changed=True, msg="Successfully deleted deploy key %s" % key_title)
        else:
            module.exit_json(changed=False, msg="Deploy key deleted or does not exists")
    if state == 'present':
        if gitlab_deploy_key.createOrUpdateDeployKey(project, key_title, key_keyfile, {'can_push': key_can_push}):
            module.exit_json(changed=True, msg="Successfully created or updated the deploy key %s" % key_title,
                             deploy_key=gitlab_deploy_key.deployKeyObject._attrs)
        else:
            module.exit_json(changed=False, msg="No need to update the deploy key %s" % key_title,
                             deploy_key=gitlab_deploy_key.deployKeyObject._attrs)
if __name__ == '__main__':
    main()