FederatedRealm: Accept shared tokens if they start being provided.
FederatedRealm: Accept shared tokens if they start being provided.

For existing accounts we should store shared token values if we
previously did not store anything.

University-of-Auckland/applicationbase,University-of-Auckland/applicationbase,University-of-Auckland/applicationbase,ausaccessfed/applicationbase,ausaccessfed/applicationbase,ausaccessfed/applicationbase