Verifies that the action is valid on the target in this context.
Parameters:
credentials – user credentials
action – string representing the action to be checked, which
should be colon separated for clarity.
target – dictionary representing the object of the action
for object creation this should be a dictionary
representing the location of the object e.g.
{‘project_id’: object.project_id}
Raises :
exception.Forbidden if verification fails.
Actions should be colon separated for clarity. For example: