@startuml class User { user_name }
class GitlabServer { gitlab_server api_token }
class Alias { user_name gitlab_server alias }
User "1" - "m" GitlabServer (User, GitlabServer) . Alias
@enduml
@startuml class Tokens { {static} user_name : str {static} gitlab_server : text api_token : text }
class Alias { {static} user_name : str {static} gitlab_server : text {static} alias : text } @enduml