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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

version_added: "2.8"
    type: str
  project:
    description:
      - Id or Full path of project in the form of group/name.
    required: true
    type: str
  title:
    description:
      - Deploy key's title.
    required: true
    type: str
  key:
    description:
      - Deploy key
    required: true
    type: str
  can_push:
    description:
      - Whether this key can push to the project.
    type: bool
    default: no
  state:
    description:
      - When C(present) the deploy key added to the project if it doesn't exist.
      - When C(absent) it will be removed from the project if it exists.
    required: true
    default: present
    type: str
    choices: [ "present", "absent" ]