##### SUMMARY
gitlab_user contains call to Display.deprecated or AnsibleModule.deprecate and is scheduled for removal

```
lib/ansible/modules/source_control/gitlab_user.py:414:4: ansible-deprecated-version: Deprecated version ('2.10') found in call to Display.deprecated or AnsibleModule.deprecate
```

##### ISSUE TYPE
 - Bug Report

##### COMPONENT NAME
```
lib/ansible/modules/source_control/gitlab_user.py
```

##### ANSIBLE VERSION
```
2.10
```

##### CONFIGURATION
N/A

##### OS / ENVIRONMENT
N/A

##### STEPS TO REPRODUCE
N/A

##### EXPECTED RESULTS
N/A

##### ACTUAL RESULTS
N/A

user = self.findUser(username)
        if user:
            self.userObject = user
            return True
        return False
    def deleteUser(self):
        if self._module.check_mode:
            return True
        user = self.userObject
        return user.delete()
def deprecation_warning(module):
    deprecated_aliases = ['login_token']
    for aliase in deprecated_aliases:
        if aliase in module.params:
            module.deprecate("Alias \'{aliase}\' is deprecated".format(aliase=aliase), "2.10")
def main():
    argument_spec = basic_auth_argument_spec()
    argument_spec.update(dict(
        server_url=dict(type='str', removed_in_version="2.10"),
        login_user=dict(type='str', no_log=True, removed_in_version="2.10"),
        login_password=dict(type='str', no_log=True, removed_in_version="2.10"),
        api_token=dict(type='str', no_log=True, aliases=["login_token"]),
        name=dict(type='str', required=True),
        state=dict(type='str', default="present", choices=["absent", "present"]),
        username=dict(type='str', required=True),
        password=dict(type='str', required=True, no_log=True),
        email=dict(type='str', required=True),