stakeDataProvider is missing

[Neozaru]

On aave-utilities (https://github.com/aave/aave-utilities/blob/eb9702b5d1f6d94922ba8ffc069baa731b0db5b0/packages/contract-helpers/src/umbrella/StakeDataProvider.ts#L77), the notion of stakeDataProvider address is explicitly mentioned.

However such an address is never referenced in this repository or the address book UI.

I think this refers to Umbrella.

[Tanishq971]

Hey i would like to work on it , could u please assign it to me