SAML common: add TODO and doc strings in models.py
SAML common: add TODO and doc strings in models.py

adieu/authentic2,pu239ppy/authentic2,incuna/authentic,incuna/authentic,incuna/authentic,adieu/authentic2,pu239ppy/authentic2,pu239ppy/authentic2,pu239ppy/authentic2,adieu/authentic2,adieu/authentic2,BryceLohr/authentic,incuna/authentic,BryceLohr/authentic,BryceLohr/authentic,BryceLohr/authentic,incuna/authentic