Allo.sol exposes two roles for managing pools, a pool manager and a pool
When a pool is created, the admin is set to the value of
caller of either method for creating a pool).
The primary function of the admin is adding and removing pool managers.
The pool manager has the ability to update the pool metadata using the
Additional responsibilities can be granted to the pool manager in the pool
strategy. For example, some strategies may wish to limit access to the
distribute function to pool managers. The
provides an 'onlyPoolManager` modifier that can be used to restrict functions.