1.assignContainer -> should be able to assign a container to a journey when requested by the CurrentClient.
newContainer -> this will be a private method to create more containers when there is no containers present
editContainer -> make a container in use active when its journey ends. updated by Logistic Company.
so collaborate with CurrentClient and the Logistic Company and the AccessContainer
mandatory methods:
1.assignContainer -> should be able to assign a container to a journey when requested by the CurrentClient.