Prioritized phase is the phase at which a given policy should be applied.
The 2 pre-defined phases are “pre” and “post” AuthZ. In addition to the phase, you can
specify a priority to indicate at what point this policy should be applied relative to other policies
defined in the same phase.
For Example, if you have the following policies defined with phases and priorities:
Apply this policy after Authorization policies are applied.
A message that describes each individual phase.
The priority at which this policy should be applied relative to other policies defined in the same phase. The lowest priority will be run first and the default priority value is 0. For information about the value format, see the Google protocol buffer documentation.