4/ To support our accounts:
1) Resolve the handle to the DID, as normal; this time, the DID will return as 'did:web...' instead of 'did:plc:...' (e.g.
@didd.uk is 'did:web:didd.uk')
2) Pull out the domain from the 'did:web:...' (i.e. 'didd.uk') — do not assume the domain is the same as the handle